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 0x58aa9351ca82e4035009f247a52e057aa83523e948e88c8dee536c1be62e6044. 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/3402a1c6-3bbe-46a1-a095-ecf4e8465606.json and https://artists.proofprofile.net/proofs/artist/3402a1c6-3bbe-46a1-a095-ecf4e8465606.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 0x8539193fe60556927666ba633d8f6f7336d306d7eb16a77ce2ce3fdc53681c18. 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/BX3OL2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201af138a0ef1a3ba99df775076615e1793af3ccf80b185bcb26bf1da7176dc5. 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/QZW9L2254543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8539193fe60556927666ba633d8f6f7336d306d7eb16a77ce2ce3fdc53681c18. 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/BX3OL2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866cde218f1e8e54b58a16f869e7809bc5ad6021f5b2701e7507b6ede6f8803a. 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/QZ5AB2353073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96b485087f65bf2cb658273f82312cb6ade965101f90b6ac8ff463668f626aa. 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/BRTO92000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d90636878a0d209646d37fd6af569f36b903b6e5170e76d3da5c95ba54f6c. 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/QZNJY2149855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362982a9f0abff35791231535b1afc9a012db149e87a87840473c8754e90fa30. 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/BXRK32400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979358ca0107a2dae3fe4d3ba29fc653e566bb54b4276b23648810398697266f. 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/QZW9L2307217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64d190f632c556ad0ad19493e4a2427036fa34757ccc5f458c94aed336da308. 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/BX2I82400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362982a9f0abff35791231535b1afc9a012db149e87a87840473c8754e90fa30. 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/BXRK32400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af7b42e546dd3f1fbecf960efb23bb9ebaa11733d677040e381998d0bafc41. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX2I82400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338c3fefcb963c2ab16dda07c60f30b82474da06a40ffb452b514c8110fb8624. 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/BX2I82400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9db677fa562cfb89598a5312fa9ab562d2fba5d0bb8379f4cf18deed5700061. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BX2I82400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5025b8c15e084fd10b67d1375b98dc52bfdfbfa5b7b2be6ed428ff4603e231. 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/BX2I82400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3bbbb4c26d00782812771ef5d38f3ef929db9eec0269a27472b89cc58e4d8c. 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/BX2I82400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d9d7df71efdcc0d64ad45ffc825bcf78dd8e40db3372be9208af69e83a8186. 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/BCL662400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d9d7df71efdcc0d64ad45ffc825bcf78dd8e40db3372be9208af69e83a8186. 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/BCL662400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa46652b706bd5a664025f1771e6d95db4da7d0bc3a46e53f5031bb48e97baab. 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/BXRK32300009.