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 0x011811ceef3a3820673cd4c0d6538ba1ec635a83ca68defa12c5b58a9daf0b55. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7b7285c-7575-4bfd-9bd4-bdb1128b2724.json and https://artists.proofprofile.net/proofs/artist/e7b7285c-7575-4bfd-9bd4-bdb1128b2724.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 0xf6e84dfb379053713489b4fdb3e5c230e790f657b72c94fb8592a36f9f458b8b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEY472377332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1ed6071ecb803834cc6eadd2a9bdbdca758d073e172e34556e55f171a016b6. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEY472377485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae649c51cf0fcd2c9e096854681b763a915e16204d8be14cee6b578a5f8dea89. 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/DEY472378927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1962ecc768df5c5916cd599e4f93c477bcf0ef89772f7c2f11de72518b80d27b. 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/DEY472470361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4902785749404633878ae0e5bc0f52da46ae453fe1e19d1c898b974b78cacd. 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/DEY472471561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55168b3f5872de8c88ca4e622595197dd9ff11261437f17d3d001ed776ff8705. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/DEY472473240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e6ef3530debfccf316892b6d2d63dc7cea0ecf9572cf5b96b4340af024d240. 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/DEY472478070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2519862b1347a8f1adf754107302545426e408f9d4f5ff549b7d450094f2ea9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEY472477982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5f7e42ae4909f236d56445a5753c54d0c1e0be79d7c132c652ca810a1364d0. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEY472478754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b746343e38f35b1b28510ea07eb83b73c4cc63368d63a71e72a1bf6ced6731. 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/DEY472478755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a74ec5a0bb62e09413e56e73295a9ef9b3791b06f1db1ebfc192d8db0d1b6a4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DEY472478759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42671ef852d48cbbb64df38be4eedb7ac152870c1e0dc32f0e697caf64b25c52. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEY472478758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479a90d1376c64f511be9893edead834ba5fc1b19973f8094bd492d1653f0735. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEY472478757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d49852d3e2b13e8ce338432df75b072e7533fb53f52791df1ab3526256b945. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEY472478987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ba6d48813cfc8647a813d9801854e8226f289ae14ecdd940d7d59d31bea45. 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/DEY472479855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41009facd4dfcb5323ddb8abf83d5257f8391092b4c77ce7e1461c92c7cfca0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEY472479894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ea6389fd790c833eb2560cb54329a08f64471de2522276e3acedeffd2cdb36. 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/DEY472482095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce46fc4eec6bec3509748f53501349b4d041b7a64ea4ab4f634069fa1e3667a. 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/DEY472573918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5013be1bb5d44ccc340487ee7f1d2d4987e54f43204dccb657fc9c52ecfba77. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEY472573912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f03133a264e728d6b6be23bf51c2350d9269aad6a9530220b6f2cbdf166357. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEY472574794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d18e658bf1331f00bd5faf1aaa079cbb984b3c706aa2c80eb2d28ee55c1cd2. 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/DEY472574795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c73f263e0a6cc43998b3579ea5d02bdfa9fabbd4bd74a93dc41f2d222613db. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DEY472575114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553ae8bfb0913d93d055fe2a35396975360bca84b0738bbc7860cfb8f5305e45. 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/DEY472575133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93b4ac313a8dc42844a7f14e18ddbfe9606430ec4745e8175c9c36215b36f63. 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/DEY472576892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473a97aa39082fb3fbc0ff92762a06fa193e1ae8107b0b32af37c4958cb471b6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEY472578075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5429390a4a751159fb31a376a1e22c59472e1fd260a8ffa11b270dd7ca27d09e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEY472578156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a07215e663062878a6f5d1ca7ee7964054d7f411c3156dc8955a06bceda40e7. 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/DEY472578911.