1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cbd2c47013a3686dae35e860e26b6a310e1bd09a61612ffee67b169e8bb89e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b740438-e67a-4094-8a21-a752dcf2c9d6.json and https://artists.proofprofile.net/proofs/artist/4b740438-e67a-4094-8a21-a752dcf2c9d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e38edb9e8adaf205d7130f237451cfebd0c7f39dbdde459f78a97e2cfc8e8ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6b8e668b464d3e348e26d14f628ed193a7d7267de4a36ababcf6e5848bdc6d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0649b4fd9fbdce3fd5c455211ef6e2cdcff4732e3fa70cca9bb609a1960f4bc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4025d16c037216b83a97a7ebfbd70dc3540059bc046e962620182a34d99cd6c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623b54d7a726eb1b27ae21d4a35252a763ee131850186134b349971a3bb8a7d2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f51cd4be5c0eea5bb725226053a67477c3fd8a3819431af265e289fb30bb3c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65be123bf8522d7d08c557f323dc11ad29f25f507d03730b0f0e6c35514edeae. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c5dd8042bf1152efdead05738bfaa7690cf751671c3102dd81c48048248ba3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0976bfc5eb235669f3cbed98d59d91588e6f3590bde472143f4b131f706138. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b8cc08b672fdc1e31d5b8aa15232dbabf71eac61f2e7f43e51c763a3e98b9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e999c903ee183cd4a998aaa0eb7796332f7f769e0f4adc1d862507e5c6e7816. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA901800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4bfe287124fa698ef38562d7dc79f6b55c28ab361ba5085b5508ed4694b80e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9c83d4eb8044cceed2f7ef03f0953c4c2efa0447815fe0b4fccc23420a9a33. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3c77dd71acc14318c9fb48399bbf8e342bc93904d8fe491f80eececf89b495. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9380241cba0cc7c9e4b1a5b0fccce0c5f825d350a7dae61de16a11b5af8d8b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936a72cd29bd623e15c71e3371acb21253760c724d7bc01cd8ccc40c45483a27. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd58776dc833de433bd5dccb70f000388479e1305c925993f28f5301e5a6ca6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902200006.
María de Buenos Aires. a) Contramilonga la funerala. b) Tangata del alba. c) Fuga y misterio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5238f28f3f5a3c6fa1cc668e3c4eaba3abf9e39eaa00e1e9f1225f222c7c7ace. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231b00dce84e4e8e3c4abe4b00f7029e3a82b07a5a266f0e534d99d5c45d31df. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054d6482d96b4d58c14294793b2226765961516a4e45494e7b0b2b5ed50378b. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36248e4091b6c1bf248dfbfde4c50b44ff8176badb1d024db0d87060489146d7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78954a10e80235b4f86dbd41707c6c17d1b6b3435751b0dfafd79f813c1fcbd. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068d1d04e38f6638f5dffcf65f112254715fe2f1b6e5625c7de04915bbaa3c62. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cf64f34703a26420972585d63c7bdc9a7580889a9a08075819f6040715534c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d07e4624e1c092cd8283628bfeb1c00723bdd7cfe04d1595e2232cf930c081. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858be2756c35180b13c41988086673163349c2f646a7733279a5bf91707b02fb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6a0d92a38ec9a28927eca4cc38d6ee8f1a8f6d74b16048c6bff9aee6bb220e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaf207f5f77d5ec0b34762cfcea3ba639e9430e8b57ca6282b858f31f1d7284. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ff8931daf624351d6bddda41740ec9dd072dcb1154c02c329f7d3fded6adaf. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d274d2b94136688684b9d16fb879fe3caecc7efb507f79e2ee64e427a93302. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f29c2abf14d54148328d307aadd7f1e99f61715e4d94d6e07862f50c41f9e8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2853c1cc18181646cd1bf4a25e44de7a83fdd3789560c264d22ab511b73bc8d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dad6f118b59fc9fc11e2b87f08d4f6b5b49177cc7f169f1eac74b553dd0498. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62928d1fb0d505fee4b46615137165a14d5acd26ef48b0efecfba563d020c7a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcede1d37aab43d96e5f3c63e80792ab560c404bc870fb6c538d26be74ee3f7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb86e303b7926c9d2380f5d2c10002180fa4b4e82079e93b17b70845a2d0f8b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1982914a06b46d3a4a9779d112cf741fb8ce6deccda9c252ccc5b7f478683bd. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2027153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f61e8e9f7fcd7fc97f6d66db780793ff97915b0a6d42ecf99709fae1eb105. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG241200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0577edcff3434c56f4342d343c81ff21a9ba5f7cf364c6f1ebfcb59455331e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1708918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cf1da0a46f63c5111342ef41bba544f496917c8b5c030c8698f9f328852d03. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1708919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231b00dce84e4e8e3c4abe4b00f7029e3a82b07a5a266f0e534d99d5c45d31df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARA902000016.