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 0x3f267579ce0071e62c57b42c8aed816d6a4272fc607d852363186c7f73404a6b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe51c72d-9208-4a12-ad0a-729e1488a2f2.json and https://artists.proofprofile.net/proofs/artist/fe51c72d-9208-4a12-ad0a-729e1488a2f2.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 0xd3d3534d37cc309285b0724d5fe9819d5039bae0d4dfa197f3c6afe1a7b753b9. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:16:42Z), 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/GBHNS1902625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a984fe33815d9a9c3c4902edb5edd72430b0d78566428e81138f88732de69. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBHNS1902520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bd1aa9ab33cff63e12bdee35294add068060fd1ccca748eb6fd6aedee12459. 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/GBHNS1902510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf825f822d5264be52dcfb7dedbbc1779e3497644cb8c65bdd2486d6e6e37b4a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBHNS1902491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcea1020d59470487f6ef0fa31775c232533bd116e17fa180da5329c3fbf7e8. 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/GBHNS1902492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c72d6fa88410af8b1799e7afe772552a181fa263f28ab32329e366119248b0. 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/GBHNS1902493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c9dd72cb00eb51861b86df2a8406975e0caacdcaffcfe78834284ed74dcf58. 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/GBHNS1902502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac27fcd63a958ab83382c48b1a19b85b875c023de49045f968b1004b58669f3. 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/GBHNS1902504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9e0e03f9b8ef997fe7f69ecf1124d70916cb17cd78789900117bbd1258a524. 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/GBHNS1902511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a984fe33815d9a9c3c4902edb5edd72430b0d78566428e81138f88732de69. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBHNS1902520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad240f3c593d09a6df6f90aa12a56d8b8a46cf7b168256db7fbbb996d21fe8f9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBHNS1902490.
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 0xbc59f006f8a1163d32b9c847a9b5b4f0a3d39d923dcba8b723970daf581e7355. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBHNS1902498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d31a2f00e702bc040f2aa2f3454faa9fae00469607c6c98f76200c210d880c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBHNS1902508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd1dae74c533c2e965557a3e0bd9a0a9b6ee267796fb302f33315663237a0f1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBHNS1902512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47c8e3aae67a762253a8f6ac0e3147fcaae8a2fe1fdbd3dd3cd9c4c364b0698. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBHNS1902517.