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 0xe995501c947fd0755497245fef0fd2058d23fceee4f9bb2b24d5cf41b5406b63. 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/b4bd04ee-9281-4661-b98a-4de56ddb9f8d.json and https://artists.proofprofile.net/proofs/artist/b4bd04ee-9281-4661-b98a-4de56ddb9f8d.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 0xe192f051608e4c28076bff512c393eb3adcd5ec2c3a046e17a4ac77b716bef5f. 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/QZES62367607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe45975afb666ebec866b1487c28bb03ca013ab41afa1f201232bbec527049c. 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/QZFYX2345373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b76d303f8bd96604ed96d86a1b957c5a7ec0e60ce449248add8af8386ebd8. 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/QZTBB2223204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee0aa47c1960449bf7b27d19b8453d264343e8252fa4986c51383b293c3c7ce. 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/QZK6Q1911001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b4cffe3d2544f9baf32a59bf3d4105d7d47cc8437e49aa46bdc1d60b00f112. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAT22106174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be84dd1925ec973c8fcde326d9852b2b342e0135ed871bf5cc470ea47d15541. 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/QZTAS2243811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4aac8c4d2effdb2942298602a9325c3c2e2216303bd2990ff1ab3dc076c641. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAT2272408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c6924fed5e4d6eb52c9887affa6bc03c192b0c32d0b6c2dbdd976e721e3068. 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/QZHNA2209123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb50a45b51f619e6605e689c376323069ed88d2de8c40d2c5633dbcf2aac4d5. 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/QZES81887354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb50a45b51f619e6605e689c376323069ed88d2de8c40d2c5633dbcf2aac4d5. 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/QZES81887354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6482f7be57275caf8bbedb56c746432cef4a7378a4417d8774e20f581a55258f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES71815732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a0858738895ca9415f128979174905c2c7dc0053acb2436aedb9575a203755. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6N1998030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8c0ddd695ce5b6cb68a71379a534c8528be44a808e6ca0a663f81b7ce940db. 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/FR10S2480294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2481cc4b594e92cd6d8c406669cbca3e2a2791d0e59a9fe48b69475455f4bf7d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:06:21Z), 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/FR10S2480295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c67579bdc47cca65359aa2e8577283c810dbbbd60e29bc481fbc69db693797. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6Q2132968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb8d11a7ceba07a8c4ff2e92575824b5d3fdd6578d5fd64e69ecaaf39bc0b91. 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/QZHN82132542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd968bfa61bcc40d710a90fa28fd1a79b517ff377d72459b17286c7c53aec85a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6H2447312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bbfe0aabe544cf3e05838d5dcecfd0e70381977720e05971bbd2457e9ff31c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ4JJ1940653.
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 0xd8ff0e46627bc59e6af0edf09df411fd090d6695ba97e60eecfa20a57c7446fc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZ4JJ1940654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2fa307610b0ce59b7ac4ab0eee102c4c0daa1e74478991b79e2180295190c4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR10S2480296.