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 0x699ea8279073559575007a1b0487b18274423af8594395c4930dc88d891005ca. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7878ee61-7d0a-4e52-8f37-c9c2c5b13512.json and https://artists.proofprofile.net/proofs/artist/7878ee61-7d0a-4e52-8f37-c9c2c5b13512.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 0x3c2fb739661370e54b2fe03d527b2cc1cf6b523c102db7d8173d3f511c000055. 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/USL4R2413262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1075ac2fae6a5e2bf71922e1feb41cdf067881f698fcb6001b9d5f617ffa0384. 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/USL4Q2498345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde53056718c34de3a27b1fd4add670b521605b34da5d4d846fa1d334e1af0b46. 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/SE5BU2480369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8f2e26988655128b63462ddc8c3b9595b3507fa9f41c16b0bcaa4b49016ad3. 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/USCGH2401458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd1375db68cbd2ae26dde9dcc2f4d9d7f96d64ea96d023b340ba408c81e2a2c. 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/SE6XY2221220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c04bbae83e25bb5483a9bf6603fd8618877bf694b9bea565906c88f6103d23. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:55:34Z), 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/SE6QE2297349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb687e9623b108a35fbc01becc1c80a67269ca2035df27f61da6151f55f56b66a. 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/SE6HN2263878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75751002d211f27f02daee9a16f5537bcf7421a665563be938ff5edf10fa1c73. 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/SE6XX2105629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0f98557f9309dda5f6935db09453f43ac7bd76690f4957bcaeec582b51c3fc. 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/SE6XX2105627.
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 0x6d1fb0d2cd83efa4c342695d85eae89ecd818d678bd338ddc60b0ffd54b2d268. 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/SE6QE2094091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbcfb55d8ab480d0e344ad7bdbc87d31067f8b9d1619a23eed444c9a6a70820. 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/SE6A92087709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93495a7763d3d8e490d413d00f68215467c7f89fecf197ddcf3439198cc20015. 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/QZNJW2253599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa814140365c00f92be0ac4c81b9aa9ffd0094709ad18e29c9c2854b4ba038c38. 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/ESA092310092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe456d723e18fa6747c20f20461b137fa5e0befa3eda85535a7edb298019454ae. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USX9P2478836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf9503c2bdf073bfa51ef6c7ba9b7fcda0ad0db4a68bc67d4eabd146dbc0d79. 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/USX9P2478842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd574e51aa2993647ac3ada437459da5b796d487ec88791895f35a7d7e58b35b8. 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/USX9P2478843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d9a8f5898e3910aa3c0c67aaad7596a59d335ddb8d22efdbe4fe2c69bea584. 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/USX9P2478844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672b7332657355f0ef626d0eb5955ce087906fc2dc18e06db30ea97effd0b3e. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/USX9P2478835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec88d56b7536afe7b550046a714e9eb49d13abed3c672800add7df994203cae. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USX9P2478837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb133ccf0b091ece122f95a2f3fba17ffd7983c3b34f73be4c0efd9e4c8d954e6. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USX9P2478838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb29d758ed8dadcba3d5955ce97e02c777596394bda60bd7db071efa9559ec1f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USX9P2478839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fde63a4915462da437cabb35020c38ebbf0dc07bad238498b1fafaf4a3740d2. 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/USX9P2478840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdd693f9c6aaaaedf27521f8928ddb0ee6d2340f157f894d616f1df797999f5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USX9P2478841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3e27c1d4bcbc648d42f3385fd9c035a70d4a15aaadf6b1812a991d289d7891. 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/USLZJ2523592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5565ed7086eb9450e16ff39467ccd98f54859d8f00bc0c3b107853b548834b9. 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/GBWUL2574003.