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 0xfe504ab8a0fa47ef75c2da3d9fb68d9da51e7e9d81f8ffd4ce3175f222510714. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2d14d0e-627e-4e78-bde7-6ffb70e7d2de.json and https://artists.proofprofile.net/proofs/artist/a2d14d0e-627e-4e78-bde7-6ffb70e7d2de.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 0x3f00c65d61e5279b35ed22d1b3f2b72f7986d0a6659e196fdce757d150872d52. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAINA1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daf7c06632495fabea904c41bd4e09e789dc6aacd0690efc1dbf973ffd1eae7. 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/CAINA1800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef0ed5ec736ceffb8d63160ca31afd5d52449d324ae88ab4322c5dc49ee57e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAINA1800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd12aa52d4d31875d6be880e4e89805443fae3f1a7801984df246c5cbec0e31. 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/CAINA1800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f9d61bf02e9057933aa9b147e948a33055d7c925fe97be31fc6202b3fd4cc7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAINA1800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e2f4dffbd21ad45a436bf53c459c9ce6b137cd6572df85663e8699b0956b20. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CAINA1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937ceb2a151e05be919bb1b7fbb12b7545a61f4956bda9dcbde9debfab7449fc. 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/CAINA1800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d756def322463d154fdd7233b59f6d80fb9c37328f3196117981e145ea95275. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAINA1800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb955bcc900631cc126c5338faa5ae81030ca20eb1c7a4ce608ca4a877a6a30. 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/CAINA1800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb955bcc900631cc126c5338faa5ae81030ca20eb1c7a4ce608ca4a877a6a30. 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/CAINA1800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40deef1f202772fdd9fd77862a9ef47dfd42a6e6cc27590dd88f9a85f6c940be. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAINA1800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c49dfc4f3e66f5afa70610328290f893bbed8052ca7f945d411ec64658264a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAINA1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da91a9f16814565bf3b2496134304f5af68da6747deea69ed25fbbc874db069. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CAINA1800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5468e3f7500eb317c5e58431535d941bbc3b744a4ca511c43e0fea2a4f6e9b8. 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/KRMIM2211222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4abeca05b4bfb59a8877c7c0510ed989cbb4000ec77e3142a5e341a0b6de02. 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/ITB002300719.