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 0x3e1ede9926af4613fcbdf122ec02279673bfc8ed82abac10256d9521b7a6f2ad. 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/47cf4c62-fc8a-41ca-a159-7f128d71b20b.json and https://artists.proofprofile.net/proofs/artist/47cf4c62-fc8a-41ca-a159-7f128d71b20b.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 0x4a38037dcc60d59440f3138da05c75f2c300e420882105de81300773667165bb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZES61912701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba69a66437d1d8e42753f2affaa0a0d2264e24ff1d6a06f38a5b532b95a2bdf. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:15Z), 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/QZFYZ2093424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83bc243042bcd3ef8bb258e6a29bd311107d89818e50fce619ff65fcec76a06. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZDA62012541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9972d6b4f9035285115c3a32430eeb3d44eff86758eecd2e7075a628d31988b8. 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/QZDA62012543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5d42518bc53a0b4203d41b4e6da2bece801c621ae25411d7e4fd3c19f2b934. 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/QZHN42052180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b05391aeffef6e8950e704f3c1ea24a84e0ef9cfdb5c5ebb0936a9d2cf4d07e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:54Z), 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/QZDA72222583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa443daa2761c23460b937e51ba64a8e17e79c9c1a96e78af6f803df835ffaa1d. 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/QZMEM2299793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f6305078e0425c243088559807b87b083b773f225e6dcbffac5a14e988f52a. 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/QZMEQ2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d810656db586a4ab67e2e94f2640e3b1b1d03ad85859cf2a0335c3ad1cf1a77. 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/QZMEN2200849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06385ccc2666eb1c4f54d2225579b62accc086c4cab46fa0023af48726ae6c68. 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/QZMEM2299795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22db7ceb9b73c58ec3e02c7ffc5117fc6aad75dc89dff766806fb9a72f16683. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZMEM2299796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd5bb170db6f5e71c9aac1862569034b9efafd9c5f39aea9c71173fafbe6b98. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMEM2299797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea091bf9f5fdb57f6e31067986e69db4129bfb463c7f2ac383367b2c7d60627. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEN2200850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28e7384fcf62913e1677b91933a91167257817289895e1a8243e7c549583c68. 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/QZMEN2200851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007b0d236faaebcbc91fccfd8de6a92c27a54d6eea409f0152f39eb2b6328f3f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMEN2200852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b10abf19368dbffef49329a60addafe70101076fa1f9492528059dcb2fb07a. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZMEM2299801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4403a12bf89346179666f8eb9eec93135f77da6f2eab4b6d194a14b9e17719. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFZ72327917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff723170cd7c0a964519eb2f2bf02eb8c6172143277f58261b041d000bae2980. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB62350443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4ed020a0c75cdf3ef615f175e89d33e983eeecceffb643076b3efa95cba52b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTB62350444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287435493dcf45e9fe699cef7b9aaed442f40ff6fc78152a1664cbb0bf75cbe5. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZRP42281399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f391958e2d496ce3e500b9d630d585764f6dd53a44da5bde953e68cc89c35b. 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/QZTB62350445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cacce2e59e1e9bad6b1958bf43fffd462004102945b769b9712191ee301dfa. 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/QZTB62350446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea450a659c593e7f07756b7d7113314b677b1eed889683674ab429019b92f40e. 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/QZTB62350447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9ddcdd0710d052fc1c13f011c8fd61832c54deaf600a4d2f2ff286c9eeebf3. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZPEW2404750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eda0c4290c3cdec79c2e24e09a5538761fd3f83c05c46f95135aa621031b38. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFS2401309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe93e726be860632f5c5788610d314545870bfe918b08b701e353fb8e9e4441. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDA42501968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc316499eba8d500091aff8bfa74105ad22d29160454e0e98ac3d3cce6bb7d228. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWZ2419493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8787b93a767a866db86cdfd46a521647dc488bb9bba17f914fbc070848d7a85c. 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/QZVEM2364767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf4ffb6ed1bfa93d10dfe10600e182506eb95ef64a1c08d7c0231790749836d. 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/QZPJ32257276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f455c25ac7783694207d18dd4238ba9e67e0b320090a91774e1757960fc4459. 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/QZHN62598911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09e86c9fd9848a36294af01bc3b952a98832f1c9a8176852ee3986edb1aa5e0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN82071325.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785c58e4d49be411ea7601c2140fbb388eaeb1e6daaa4d3c5a67fbf711830149. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZHN82071328.