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 0xbbe6a83d0ca5f681d53668fa20ed702c453e2a2f05ef39435827d0d1190a9993. 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/324bc618-e2c0-4478-be3f-f959a2a7449c.json and https://artists.proofprofile.net/proofs/artist/324bc618-e2c0-4478-be3f-f959a2a7449c.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 0x54ecf8316ebf81921a5669c1059fe5c8f62689e5a5e65bfa0685144f0ad5b4d4. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:15Z), 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/TCAFW2184673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe422ba9260daf10100e65d7556ebf1e579cfa066d925381dcf6b86d5635276b1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ7362300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeff132482de4e7ac9c4b9b4bfb2f3586df203f49944df73a79cf6ed95b6b86. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZ7362200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9177604b256441c2a2b60e4e24aae29906b48e0f5a8c006b1d2d758f5f68e22. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ7362200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3c00a30a7b7af6d691587b38698c8026f6849ab9aee2c78508d4d4ed5ba31c. 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/QZ7362400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee547ce223319122507510b66c2f3c31779854c3d4ae9196559ec595697f5a74. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZ7362400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b149b85fdc0e50c2efc2d6be16484991ba979a23a8795623feb18c011caa1. 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/QZ7362500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52756d8e6b2f80097ea9d34ca9e70ebceebbfff8ff84ca57f45af3082b3b0609. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ7362500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4754da01339b063d4ddbc1a4f323cc85cd381bea249aa1376464e2e335f7f029. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:08Z), 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/QZ7362500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd71ac45e07937155d020ca51af6e62b18a9c60e0ffa99eddb6fbd5bbd8a0ef. 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/QZ7362500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee547ce223319122507510b66c2f3c31779854c3d4ae9196559ec595697f5a74. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZ7362400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3c00a30a7b7af6d691587b38698c8026f6849ab9aee2c78508d4d4ed5ba31c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ7362400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a84427d58764541722f93576f9be45e24e17ef3832bb5b32a391b64f7f8fb8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZ7362500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cd303896ce90b633931f7b4c46bb901a72d99e26e822652bcd60064d4108e4. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZ7362500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068200d07b6c031f6319547f05b21f588f006ed6c51a8a3390b883ba5a1ecabe. 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/QZ7362500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0587dc3fc017fb5bef268f6987eb191591830c895cb75b416c8a05f977a51376. 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/QZ7362500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b149b85fdc0e50c2efc2d6be16484991ba979a23a8795623feb18c011caa1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZ7362500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075c3458d31103e2f6104a79451663942ba0c62a93f53177f989092bd5b5e28e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ7362500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52756d8e6b2f80097ea9d34ca9e70ebceebbfff8ff84ca57f45af3082b3b0609. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ7362500055.