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 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 0xe2837f3a0392960b42f2ef6fca8f335a35999f1162fecd69c40f9914d181c40d. 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/1a87f593-47bf-4f5f-b0dc-22a529d150aa.json and https://artists.proofprofile.net/proofs/artist/1a87f593-47bf-4f5f-b0dc-22a529d150aa.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 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 0xcfb786774c970109440ffca13aea69f10c1cab4493b97fc8f308edbb95c07ec6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TW2095918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe603b273f79ade255a2753b6fa99f8e5bfa9792afb12d664d1cb93f1ee7c4481. 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/QMFME2091935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5699e8529d9dd28b86ae254f74d99e22b56e0390de37be349901c98853756cd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMDA72314215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4210567ef8c6162ced91659a6b04b7aae7ce67b79a31fd3fdd0d3f39dfa297a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6P42375820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4647fd1c6e6b6da9ddd4349420d0a7db85da097a71e582b33880307c81d9385a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM6P42316588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421a2917d1d0c00cbccbd780ad5185932299d1baa1cc9f5d923911175e7c276d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMFMG2322337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d8f27349caef4c2dc7aaa2c71639e33676f0b37cc8077469dffb3bccdca5ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFME2380154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92450067334c1e1c76543dfa288aae230e2d28b8f9fda965e2b0e491deb189bf. 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/QZTPX2331509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d29924e8268386175a1103870900eeea126af4dbe1f4c36c79dbd478f443f8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMDA72204861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5ccd8996c9857ca75fb8f9c5e0460eafed0e8545d9a1f9daf4a4f82eee6b97. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMDA62240600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d6fd89f313e38b3b761036c48891943b4ac6fa8ff55e6ea75348e659201c8b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92260389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb3c977c2ca13ac710aad3053b3570eb33eb294503ba8cfb7c4a7a26ba3615. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6N22274587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5cfc9ab424eb437a4a7dfd83358ed21b84619dbfa4867c083298d6ccc425bd. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QM6N22274565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d5d5e08c8395fdcab82a2cba48ab063dea9bde1402fb3579eaade46d3c3c19. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM4TX2253091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a44bcb81276db94821be2a4e2b692e8e57163e38d49259913ee64ea4068405. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM4TX2234863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbc5fbe654d43113967b84eeb723c96bf62662dcf994086c56f0dc4608b0005. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TX2228122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0d3be3352fae1127a072e0701a5deabd512e0b5238699c30f45de8a25d9bc5. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QMDA62113853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d95b82b7ffe46fd4056bb5a8cef8dd52c7d7cb8b431b9e0b2e5275a37aff152. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62113854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd693e0e762319e0fd2e1aacebd35a71382576ef1a69019a6411523ece0df1c7b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QMFME2199796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b36064c6484466442ac974982bb7502383bfd08c7766713bac24bf8754892ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb006b8880dc9d054d077b505048723e149277ee07853865e22a57e8fcc5d81ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92080639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1997cbe55d04747775bb3e4677c09b7f6899da65a3a2fb0d96c535ac7a94f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ92001355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889bead048b63fd1ac33dcc17b5eea52c73c05928a64a7e3d73f2008685e33c4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6P42064241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a967230c686bcb514270aa58805eabfacbde3ff45201b2b5c33847809820bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N22097412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4215e472ce548ec260f7ed7a3b2097bb21ee45f00faa27a1ae3948741ccea6b5. 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/QM4TX2090060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb697e62927d8237950ec1d75f02941a45c86b9647cb8d23de5798a064e2afc37. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/ES71G1928886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488e300612c05b24f9bc78ac2ebae1dfd2fcf3df40af3a7dabcb65eadae981ea. 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/ES71G1922137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad10babe4a54efe20de94a7f388d0a2ed70429a9ce711a9c2d5d844141438b. 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/ES71G1918000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d7e0e91634b6b651ca053a62e08e83120a01b7e0f67541aa69556ebe29f088. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ES71G1919995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcc7c92c8ac011368d977ae89e5ded0d6f341ac8c6ac8ec3c362b82ac953ee7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1902963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7349fe5bb3d97cc9410fef5301b0abe7648ad739f6496557fb13ddf1c9fce29c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1923523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681d2ba2c8a7a80e48eff67529b5c77fc08aa7863d2580f99fd03fd3b7b66de7. 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/ES71G1905120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adc8d109584a720eb4160d1444c93828c5a9c34576eab09f350e795f42097e3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES71G1946577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd099514b0c3a2cdf633e4a815bffba72e460baad159e4d902a687bdec5f2cfb9. 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/ES71G1940112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dd6eb723f69c7ac53e3ca2cdb71a3b72cf1f6568803792714e21edfeb5318d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QMFME1968729.