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 0x4948164638157301d74ad910d4ee53a0b72ad559be685779c7884ee6656b9f37. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ee464d6-3f21-477e-893e-46bcff14651e.json and https://artists.proofprofile.net/proofs/artist/0ee464d6-3f21-477e-893e-46bcff14651e.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 0xbc9b508cd354e834585ecf02aaf0b776640a3f4ba89d023cd00590ac7eef7c70. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:14Z), 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/TCADZ1858249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc108fea745f61b84efe51d11e52c04cd7370d8ca00eab25f82b24de444a3ebc6. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAIQ2479289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fecf82b2d66c1b5cc7ac45656c80a357b59da585f4c8ee5f5d2d64418c65b6. 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/TCAJH2547171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c2f41af9fa2c4d3fcf226e4bbc16c3ea9d017967e195b171e5df7270fa3c1d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS7J2534471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c13d152bed0d29b66567addf95a32b708807add9416182032a9b1092a88ebe. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZS7J2510631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98975a74bcde7ee060413c46e98647cdac88ec5d689864c3b70bcb8d0187551d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZS7J2515473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee998cf916f72b9422c8a2bbbe562a0641a7bf9637450cf69dfd9899540dabd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZS7J2533398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee10117d521ceffa1ff666965a6018f722f2e6c31d9d3efd4677aed1169b9f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:47:11Z), 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/QZS7J2519152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f8ccae78c75a7b2f9ce127085ae8279a8180208136294b9b0a38c17014b0aa. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:01Z), 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/QZS7J2527319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ad4ecd936b9fc9aebf0229339263dbde778b7390549596b3aee0b24e71de52. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD51968896.