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 0xe3e8413a34451977fd2b078f5135dc4b7dd85b89eb76aa3468e42bd09dfb14c9. 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/654e7af9-c651-4276-8470-5718f12d7899.json and https://artists.proofprofile.net/proofs/artist/654e7af9-c651-4276-8470-5718f12d7899.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 0x90839ce9d2c64b3d00ff5b5e3616632e1ce25bb7792bbe799642640e1a1e0041. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/NL1GH2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d61d20058ece19e763808e011121ec13fd822765e401d51f320c391fba7e5b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NL1GH2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47febe437fe65f24238dc95d08e0f495abb324dec263e7410d9d3051cc4b19dd. 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/NL1GH2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184d7859c7bf171bd609768b87076a43413aa5f74950b736bd534f064923ac18. 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/NL1GH2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e3fe5218abb143c2243ea8dd035fb987c5495316eb49f6e1ebcc13963eae0a. 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/NL1GH2300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e5ab68e7b6de7ccae1eda8eac96bdbbc043e6275c129328c4b525926a41f7. 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/NL1GH2300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2da27300cef4206d066a1f1f2bb7dd8ca332fde80bcaa08b776c21c9513fe85. 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/NL1GH2300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6dac3eec0390f25a59b9da3e2c163e44765e4cfb6c2560770fe9668d459794. 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/NL1GH2300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52484a25c17342ceb12a687d59832ba5741a1a5751f7b45f55e2cbd0f6c64b7c. 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/NL1GH2300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944dd4452cfc19fef317d3cefe1599a284dce94cfe2115fc08f936105616696c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEG932303926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460347e9202ca89b4238fa3e32d80081ea8b7648d62d7ad6e4089fdc8a427cae. 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/DEG932303925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5599905f9066544cfed48adef68af4ec6cdd685d3d2cb5f596193a004646f34e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEU672400893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cae28a19dca2cc28f4cd0babb1a3be8940d2d94d6f25a6e09d403aae16be58. 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/DEU672400894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa548ce1c9ac552a894ca5f27f1a20e819a478fcf9d448dd1d1230936893f0472. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEU672400895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a701667a13473fbce16e11620c21970867809cf2e700cbe3be7f7f988a9954a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEU672400896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7388c4658a646229eb484181f09928507f1b03ffb307dfc6116442c5b6fd0c09. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DETB32401265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6830c5ef9fb5bd5624b06ec392c408955361d7bb9a41c743dc70d2f4c697e3fb. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/DETB32401266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2f762b31cd6f97947ee3061cd32de2283a0405fbf8f15e4e58bcce3adea61. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE2WJ2505001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf981924063c594a1371af19a88ad08e02396890970dbbef717d18eb3e934205c. 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/SE2WJ2505002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c875d73fd58d8c11b1f12e7c894aadbfa84ee0391a14b61022a0731d7b8019. 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/SE2WJ2505003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b1635f564a84f86dc3907a7cabac9145f91190512966d24505a43eca1e0f1. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/US83Z2510794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa134545044de2671212e37bb87de53f76ab12d3cad9b4df6aa61a2a0195c4a7d. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/CA5KR2385453.