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 0x6b67abc796119aa35e18f63ebe4e1063d943eaf108a3e38e067db8017c42b879. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9a0d1e1-95d8-4119-a48f-14b7f97ab136.json and https://artists.proofprofile.net/proofs/artist/e9a0d1e1-95d8-4119-a48f-14b7f97ab136.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 0x406c14cfc246cfe6608403ca07f2c698a583bc0ded08acdef9856eea6f10fe21. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE5Q51900248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7004c21177fd1bc1ff472e49e1b6e13eda3e8e0df5249b229b6501c79189ef2. 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/SE5Q51828908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b3128226efd5b47720197bbfc21bcc06fcc995f2868a5aca422034cce76cc5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:05:24Z), 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/SE5Q51815128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945655a427880f96b4d862ede57b9ed7503a98d603d2dce5c04835e9186884a9. 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/SE5Q51829002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1b33313d64dc3060b61123332512abd1a9d5ba11071ec67bca011a907d943e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5Q52002406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174f865c2b540f76d11a8f9d468131e3607c04d3512b9d11e1a5b507c81df1a4. 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/SE5Q52004234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd595bca0e69798c69a3cb4509ef54ab0a959ca9759fc1d7759aec0978cd55ce9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5Q52100653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87547e421ab37011e53cebba9686b6b0f7919885ab9e6e1818ff4d4b216c03c1. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/SE5Q52100224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4fc65c1b7608555676531188484e1e3340ee44456aa6de4307bd99dcc1a962. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/SE5Q52101678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f16143439155652c367df8469cfcfe1e4c34f7b7ee98390d74232b8e70bee25. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/SE5Q52102558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71daedd16fad1c7d9db96cef768622492313ae410f12d3eefa65ad7c3f6f7501. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/SE5Q52103167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c618ecfcc7b731c3e79cfce10d061c5276e5e16d52abed9b3930555c097d59f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:49Z), 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/SE5Q52103073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa738520d9cfbba300c1290ede452060d1e6d2baa07daad3d1311f3fe553d791. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5Q52200458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470b11d40828ff51204f1dcf61a8ac3edd7c3a0ae66b2e4f2ed6a4b88180bb45. 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/SE5Q52103834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd342069e6f232181156587e6eb4c5c6b6631adfab1c731c79b3b26dea6874505. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE5Q52202250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684496e348e4caa554e17ec2f638a6630cf5e0406fa1c0d60560e5690dd26f63. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE5Q52203788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bc5f267ac6051947162eeae93562d451aca15a5138a8b49787c79ceda2aae1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5Q52203417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bf044e529bf16c1d9162697607d3ea69b72f27b82a5a9f248bc125a63e62cd. 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/SE5Q52204157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce2a84451ff7a1968de61f794f4588a38b87ef0b7c8966430bac69dbe16c884. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SE5Q52304456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece7c41d6cea0ca5dbcc0e2981bf1146c19baf891db366dbff94d1834fe95418. 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/SE5Q52304793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce5bb100fd5d5bfa7f11a3f40ea97928da74dccb063d4075bc827d1eb009200. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5Q52304998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5850c3822d67e61b24c021d12b4205b440d9b66419d2a9bf79ca2df8ea6817. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/SE5Q52400836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc159f5af6eddfbce879f641fe4a981a8ad919024078c32e58cd5b791d2de47e3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5Q52400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3e181b33c896d5ea6bca1a2f398a1780821c5839779d42ec06d95ff6d49a56. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5Q52401972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879d268ca569997da85fc41da966b52b0195123e220a224bc79fe426ecc7a40f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5Q52501259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b129fbfff280bdb12a84798e15edd24ba9b43da0804163bd0a0d8532066de8. 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/SE5Q52501791.