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 0xc1a656d3a9dbd4f15424e9ecbde14bbcc6dd1da05978c6a77fec01b8decb2b6b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/377cf61f-346b-4c95-92db-2f8369816e29.json and https://artists.proofprofile.net/proofs/artist/377cf61f-346b-4c95-92db-2f8369816e29.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 0x2b5b39cda88624517a5b1bb704cdd567a3874b1ce1f6d395a3b419502731e103. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLZC1600098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5b39cda88624517a5b1bb704cdd567a3874b1ce1f6d395a3b419502731e103. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLZC1600098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb6760c61130e40e9e1e0fddf5614725ec1e084a75041d7a0d6a00a8aa00fb7. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBLZC1600100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d1a739c3fbec26b97332bc1ea35cc500d59affe27aa3bd304d5f7ac26696c6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBLZC1800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9745752dd6b72732a9c54e28cb7fe150b1424fbd3925ba5a04db7e0e27ede72. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBLZC1800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fbe5f6ad984c47dcf3943cd129353bb2a73732cfdc90744ff295e62a8e0033. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLZC1800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bc57364f9a23a739836be3c9b5537cd07e778c2f363bca75fb7fe47a7550ef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLZC1800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d61f643462a210e71d74327d9b66ead372dfd84c59c511d35e41d347003c198. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBLZC1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fbe5f6ad984c47dcf3943cd129353bb2a73732cfdc90744ff295e62a8e0033. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLZC1800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bc57364f9a23a739836be3c9b5537cd07e778c2f363bca75fb7fe47a7550ef. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBLZC1800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c559369e508df3e46cd3d41a61d3cc34b00990eac8ce8b34da16277f1d1f4d6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLZC1800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d61f643462a210e71d74327d9b66ead372dfd84c59c511d35e41d347003c198. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBLZC1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f22e8a5195c1978736afcadd5c64700a6a19b3bc33afeec87764f9890c75388. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBLZC1900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59758abddb066c745bfb836c2782787eb84be4a0ada8a69b75c75a0c3786026. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GBLZC1900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870b78aa34bf54049688d763c0d2dd5d1e7d6ade1322f04466fd663d896b1729. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLZC1900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c6763a619541b84d43b0387e451c6fa3920e4e218d72d1c143a67c9d95a4a4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBLZC1900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870b78aa34bf54049688d763c0d2dd5d1e7d6ade1322f04466fd663d896b1729. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/GBLZC1900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c6763a619541b84d43b0387e451c6fa3920e4e218d72d1c143a67c9d95a4a4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBLZC1900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cc0c96321fce53b0a054f76868f09aa49c9e5a03c8b657f692497d24403ae7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAZ2206393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8b02df172435d6297475aff15e35814c5d468c00a95f9f8caa9ebc33838eb5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAS2263998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48096c8eb131cc2e739fa18114599f08e0a05e88641de7cc3b4357ef61f295c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZTAS2264003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822302dbf080455e3ee998f5228cfb0dab6095c211938702b68e3e33fbc60d08. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZTAS2264004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1885e342b45e9b817e10fd550650ac535d34844b3d3e903a4dc742e50ca6177. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAS2264007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc4472dd97fc0e77765bed32dc7003849208f446f85bc110f665b0bf4ad6495. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA72383519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899d814716135fd7973a7a7ecfe545363c3da4cdd7c272b972833aa54c60bd65. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA72383520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe581ca2e90b8d23cc500beffce9198b4703157dd8b618f12ec9c56546920a347. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA72383521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf316878f2241e424153c6d29af8a28447ea343f8f926dd8c6a50a9e35199a99. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZDA72383522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea2f486b19d3c8508f89c750d03cb052d8e8879518ed88293a86463eeb6cedb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZDA72383523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e8d6772328a1e7d14768aa1c05e6a3893aec94d265074e09d379eeba032aae. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZDA72383524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56119d34226129d78e2878c6fa2d4d09f42db9a3295a9cd142131dab40cc55cf. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZDA72383525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e097d4336b1f9f94afe8bc8d308d422697f8ae0b67bb2d9a23477850c5e74c. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZDA72383526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87135d71929db1eba0fb495994cf6b05acb0df73918633b8ca67409efce3b945. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZDA72383527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06174af7e20dbb432bbb8d182450071bcd1e00968b9fbe344b29220d371ae3d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA72383528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b9f6201f5852ad9f635d2f52c9e7ffcfc19a90e9cfad266935fe4e3c4fe0d1. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZTB52422779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a74231122c9c0c7625348e36089446612e41983c1197db8826b38fd2ecae8e0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB72486178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355e01558a586fd6457f42017ec45734b1944461638faaf895919a129d84eb89. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB52422781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd4034cba032f5532eb697734f3c6b1f6d9a5e469d365992c5209c643289861. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB52422782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a563d6bcf79aeaad550097a87a9b6de75de247d4678c84187546f5df342857. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB52422783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc288ba5f68e5f47e5991ed1f6bc8b051da88c22a6a04b1c4c9d7c7b17e70a56d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB52422785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07dd8f252a6bd697ff7b4d70ce65c8923f616426143965741edeb1ceef42b45. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB52422788.