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 0xdbf8b886bdd7872b291da7c8d672cb0ff85e08d64135470db8d3fef239e06a4e. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c3863e2-96e8-40d4-a457-eb86b41b3d4e.json and https://artists.proofprofile.net/proofs/artist/8c3863e2-96e8-40d4-a457-eb86b41b3d4e.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 0xc27c629c78a8d6de8f12cf982db06cbef4a63319598c0dc95c85caf20dff7598. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SKA832013403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba93bcab48b1252c7896dba9ff505a5c4aeb8c25859823537a86ecc956ee4714. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZB872205002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0f160f5483f3c927f7702b903392ab0dcb6c732d9f7523407e036e011fdca0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CZB872205003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b337102cdfac9d2dc58f12e077d0f3a73dd92f98ffdddfd9c4d767aa8fa0424. 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/CZB872205004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6e7510334b3b565cd447c2380cd4d97f566407ba12defbbc210b2bfdd78af4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CZB872205007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffee52894206b148e4d11f318775b10a57373550fe78957c98f63ef600d6223. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/CZB872205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4069d351ae835b140ff73b8ca4c599047d49cb0aec85a4a71e6207592146315. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CZA162401387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6e1656a4e16c698023988f6477c11c78753a9fc9ff0dde0eb0073c180204de. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:26Z), 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/CZB872501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6e1656a4e16c698023988f6477c11c78753a9fc9ff0dde0eb0073c180204de. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/CZB872501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbae051325cf2b1193d3ff64ce7632facb23bde7dee80ca14ea92bc1eb849ac. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZB872501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f992b47df54e1b1b0ecf07d103996f5b2f9c035e3dfc0919dcfe4b2af8313. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZB872501003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fda59aa0bea66fc4f625afaeb8848d69a6f7adc988ed0847ec3e681866f4f76. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CZB872501005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856c2a077a5657c14068d2d212044a4c89265e422f9a55d5f5c5a3fa13ca1754. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZB872501007.