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 0xb7b579304c534e59bf21af9d1a878d2082a6afeeb7f110efc2ef431ea0600194. 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/1f828933-673e-45de-b411-d6be1c027317.json and https://artists.proofprofile.net/proofs/artist/1f828933-673e-45de-b411-d6be1c027317.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mother 4 Soundtraaaack!! (Original Video Game Soundtrack)
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 0xb0aec0b2c79cfa657c75b3d47d6ad505cf2ba3bb26bf83db3d636b5be7a4e05e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZANL1754114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625a186ffe6088e28c9455ea16f88125c09d0453b68a0a262da6f9b7c6530876. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZANL1754116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28215f8e4a4f017b59ec62f4d70cd4dad7046296ad25cdaef623ba1b5d683e9. 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/QZANL1754118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7171466a187a7d3500662e3dbf05f3c8634ede12a8a18b38c46d92086e0ca7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZANL1754120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7911c8033071cb6e56537cbec48e6d57c7988c773b0cbb3a75407c803b52590. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:44:41Z), 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/QZANL1754121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec8517b49779455a3ef240b1bdbc9e8174a3f9565d450f0f8a836180cad64ea. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:02:57Z), 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/QZANL1754125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd3d3c125f840299ff2681a4a1a12e85639ed0925ec809acf0bff37e7babe9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZANL1754126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17f37f76f4ac8dba0a2b282d58abbd355c367a70ae843b22c40bf8c3ac38704. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:17:38Z), 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/QZANL1754127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21662db7e9ac2e5dc8e58814b01db2c4642bcda3e6925c54a3a5db787dfeb92d. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZANL1754129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0058a4101931430e2a3f072ffec2e7890947e8d9a9796f617d91f1711fd68f4b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZANL1754131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef42ad006db81416e53e0eb605a2510bdd5e02febff39ef2841365a855b35409. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZANL1754133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07348233c7ef7148d64838cdae7e22806b61859d768d369a71807fc540f7b24. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZANL1754135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecb8bcfeb1413d4bf9d2f30b82dc6b7200abb754dc81b423579dcbbb7a12bc2. 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/QZANL1754157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6670a8800839226513e0043140170c64dc6ec7cc914be6de2948451262f44f76. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZANL1754160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa584493020992eabe6f43e7a98164788beb2e975d5ee352b71edda4c851ddcbf. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZANL1754165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd939be1189ba71b0509243305450a03ba3dee5b991ce13fce82e1af565bc77e8. 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/QZJRC2222488.