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
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
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 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 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 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.
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 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 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 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 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 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 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 0x231b00dce84e4e8e3c4abe4b00f7029e3a82b07a5a266f0e534d99d5c45d31df. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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.