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 0x979042b61df41e71cbc6221cf021c71e9548737be75f01bbfd3ecf7c15f8b401. 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/c37d5a49-94b8-416e-895a-edf5da1c7da9.json and https://artists.proofprofile.net/proofs/artist/c37d5a49-94b8-416e-895a-edf5da1c7da9.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 0xf06511fbe8f2bb47b0f839e08530feec4d54f6b25860082b8bde3813cbf082d1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHZ41950128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9665f864ed8c48767905c8ea5fde26c6e65d1f1ae9e086dc6b99ec978a91a83e. 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/QZHZ41950129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b2c19279cc085e2e29f7aba2199343d62c6e29ff3a60cbc7fb133af4523205. 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/QZHZ41950130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b57f71baf6de1c5c6410d2d49cce25d5870d04e626eca0e4a871bbec71f0dbd. 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/QZHZ41950131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63b1f3463ec10f95e270c6a769cf00b87455832e9bbb1f209cb2cc409f4dbd1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHZ41950132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ee615d7e02fef1cbb3ef159326838799bcc424857755612c33b097ca6428ae. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHZ41950133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79d9bbde68561bd89aa6a552d8dfde14cdc062a8122d8d7df3856f1d3ad6ebb. 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/QZHZ41950134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb476ca48820066eedc34c4b1c87e7dbcb97dff51afcf8f8a4470be780a5413. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZHZ41950135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc92c8ef55953194d6b89f00a50c1a9c8562402c980a76a3cf4c3fa21a06dc7. 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/QZHZ41950136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5903e59940bf8018e8de33e55f306c37ad59dcf42792546a15fd6eabd02a959. 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/QZHZ41950141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edbc5bb778288d50749941e7db52025a54687934f35d92a9f1094cfdc6ff5dc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:20:37Z), 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/QZHZ41950142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3998acbcfc300e2376be73b620d711f1854a6c6b047f6c8c6a54845c3dfac2. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZHZ41962680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595109a22a815d3984567297f771f078200bc12f1dd51c69ccdf274983cdfadf. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHZ41962682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2393f0620d0ffcc19f83887efa7f538a8bdc40ac51f9dd9d6cc4f8efdd6a44b5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:29Z), 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/QZHZ41962683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b0341bed128d16f98f7aa02f2064298190edf23d5934ee2def918bcd3b28e7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHZ41962684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75013926ebf5537230fd6d8d07705d78ec8ed55c0877ab939a5d89b178b555c6. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHZ41962685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ad641aaf4f0ff8c7c5902fe74c18a2217fa989721145e09871232468b7aee4. 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/QZHZ41962686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582b2fdad1ae69e47df1cd19d3275eefbfd4f247b881fc507632fe538edc86c2. 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/QZHZ41962687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56271272f757fdc1dab790df5d9f0f599060544f854415fd6a0cf783ea5fd8cf. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHZ41962688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ad3a8ed6be0129724c1f5f107db7771bd52ee6ef9ab691443351c4c4cb748f. 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/QZHZ41962689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdff645167846a2684b16b2049e00fa9feed1bdc1f51ea730d966827326039b. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:20Z), 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/QZHZ41962690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d4d658a680aa3e88e1c2af0cb851f5c1e57b874e56b65acf60071767564f37. 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/QZHZ41962691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aaafee2361e0f58e53a65be735800faa820f3a29be2c9e34e591a3442f4da2. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZHZ41962692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57394279680edb894bff6fef4f43863782c5dd8930135633bde232a90b450019. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:40Z), 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/QZHZ41962694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe038e54b733a8033206cf781dc74f8aed083fe18301afb7b1b32fddb89b2e1de. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHZ41962695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998f07c8d6717c612a94711046c055cf3306cb26e359928826c6681a3bf796ba. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZHZ41962696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c311deffaaec2fba4adc900003b09115fc27db5904a7a23b540f85de229031. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:45Z), 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/QZHZ41962697.