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 0xeac599d9547199d8d8f5e29712289e6bfd5bfc9d0da087245b9bdb72a9ca880c. 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/ddb49365-7c9d-41e8-a653-91f4823ba3f9.json and https://artists.proofprofile.net/proofs/artist/ddb49365-7c9d-41e8-a653-91f4823ba3f9.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 0x8cf6cb7fc2b87650696569d5d21085209ab738197a7c46eb39015e29cd3f907c. 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/FR0Z50042450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93efc9234aab8ea2be9232c53f3560cc968f626dc535a612722eefeb20f875bb. 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/FR0Z50042451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2ec49c264efc1d9da3c0a34bc4162eab13a29e1feaf810e212e304f5b3fa03. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR0Z50042452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a378d3bef02fe148532cffccb6308e44f722ca6c979f64c4cd87866bb1b238. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/FR0Z50042453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fda92baccac351219b5d5dc79e36fb68cde0f3efa1f692296f69df607e27cc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR0Z50063292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36725ca512009a32ded936982c4ad1bda32d974740527544ef20628fbed389e3. 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/FR0Z50063291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e39b3bf9fb6a909692e3e40df1e21f44409f0f78bf768b86bd8c3e64f2a8df. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR0Z50071142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec39a5c36f7a989283d0f654e9964335ea17f49c5946ec325a177c4cd48b6c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR0Z50082685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113a63ce679a807b3fe493371e5fa4b9c2102ef3257d43da37b2b6af7d7ef0eb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR0Z50082686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099aa2f3c9e6763b1a1c0b767a2c793028dc5a64836e106e948ebaa8d8dee58. 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/FR0Z50082687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2813873d615fc6fdec5b357cfd4d7f5e4f4ddbefdb2be5b1ac686f073d4b91c5. 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/FR0Z50082688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3222c6c502fe9d47756ef4565be27c77a3ccd5fa95c420bad8ad8e7e21acbc91. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR0Z50094167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05c1d5e3dfebc46ac92af6d4e3d0005b01329d8cb39e76a2dfbc2cc5a1ebbbe. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR0Z50094168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d33fab425e788d93363788826a69ae4157e4a45ca249bbb947dc6d8bac659e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR0Z50094169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e379deb5b2192eba3138ff632b52cc0708afe67fecf4d57a746081bba1830e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR0Z50099426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120f5d70cfe28437bf521029aea1923556bd86678de3e9ce5c6ba58750cc157d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR0Z50100839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356553f518e415229edd0a5e00ba467de394971edb334f1106849a27ba57ab0f. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FR0Z50113036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7fcde21a126d1e0505303d97cc0cffd154e690ceba201eda5d82bd7f69074. 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/FR0Z50114709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f358a449d2b30eebd68d91b2420c34d7d17395b2b4d85c4b7cad51390cf0744. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MLA0R2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b702800fa3b2f433306c6b394889b63a8139578e39806ef44bd0f6125868ca. 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/MLA0R2500006.