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 0xccc8da605778ab3ce88e3ce2a86f174300a25ee81193abfb21f4b7ab752aabe2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb207785-8344-4cf6-b1da-f452501c5290.json and https://artists.proofprofile.net/proofs/artist/cb207785-8344-4cf6-b1da-f452501c5290.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 0xb80c22813d5e9a92685a6780fabf49b4d57a251c2dfd11b3ad767054d11db932. 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/QZHZ31976789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa026f957227e970738c26aafd98e53ab23b154cacab36fb2be17939c7fce4782. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJZ2156853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90506861f0af0291fad674725096370fae9aeed57787cafad8d799c29a4c4ef. 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/BXJGE2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88183733c95c26d2de609a0376bf8e1c95b0994637f5ead71095cbd300d59878. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZ5AB2238119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28952386373d659656ce002580e402c7db7fc23aa6c051c309f280f785e12b6f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZGLM2221268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619156d4b5b4a27ff5349c706e57de3a02ddb65750ddbb5d5af8f6aa06e51ae7. 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/QZGLM2340922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffdaf31bcf688fb1c8525eec47841a540cef70aa0d7d626bdd8a63f4562d365. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZGLS2337769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4762790588aa4ebc182ea824c861928a8c116352e67f5daec1364e98b42b7b. 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/QZNJV2396027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ff8b654c6ace60af0afd2289375c4f7dee26fd6bdfd936f560bc5a0d558cb2. 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/QZNJX2393996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cd7121bb5e6846492bd98c30eec7025d5697ab5ced84d570282ddf8f0977cc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZW9K2304770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fece1ac63f64f13de49dba6e3d39051ce31d6608e91281ffe86f55539b0a0be. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZW9L2318838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ff1e091216c58a5ee1285fd3815e134159ff2791e68ebd12fc148125cea4a7. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNJV2426119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5bc60c04f5180667e243db0acaf6737bfa88e1d4acdd82ea3c6552bf8517b. 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/QZNJV2499791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7248585adbdc48ce7e8e20cdea53bd8bc2f898d2fe09868af9847dc204614f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNJY2458213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85d39252a5864b04c2d3e3e404c4b91326e1cbcd1a367f1df676a6286c6f927. 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/QZTPX2562843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a22be105136c64691b25681d65eeb0c3436679dda99e35d64887a99f821b727. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTPX2562836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b325bc222f6bc0f7b613ee158e6b8465beaa1b525c1c9693cb375dfce9e3269. 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/QZTPX2562844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666b3ab941cb32378fa7c4d8ecb38d1bdaf5b670e1a9b89e0430200e24e0d30d. 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/QZTPX2562837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a41a46ac00a28cf61a016081e4bdec6a4c96b3e0eadded4fd0318a537e2e495. 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/QZTPX2562845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa6109e04ff79ec13d864c5f2661c066888b7d13755d1425720e2ae2418f564. 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/QZTPX2562838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b17db1f49c06c739fe33973752c712e03bb03edc7fd8d024fcad01f2f2413b8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTPX2562846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1497ca70d41bf993b34db1658d166fb1104f978fc07f86d0bf3395c94e43dfb9. 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/QZTPX2562839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444a87aa698711dc0c44ed45dc8e40df26103bfc0e44488f85599079296bdd6c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTPX2562847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b1f258ee66305514be7def02ba1c6134afc5d1556e2c6d5d296f79ef1fabee. 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/QZTPX2562840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce855ef718e47778ba2dc6cb1aacf1f614dcf8370136ecb148729615c02b3534. 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/QZTPX2562848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f7a8d782fbd585366d0279706dc4d8061a99cc522a659c7c3ac082f08e797b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTPX2562841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896a6a1d59df62de18464ead17eb0ff8a4aa08defe33291f3e603286fafab434. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2562849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebbb3c79ef77d9f0a9d08628dc9cbb5d96bdea16163e5897a6606567ad0359d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTPX2562842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3665458cb38b1430220ab6b6b74907cab73eccdd536203036ab44652134cf2ca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTPX2562850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619cc5ddd8bf6d0648b92873c7c6153707856afea36144947363c6f54100ad7e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZTPX2562851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2090c25078e25a4a03050a0c0964d5033c91f0aa03f254ea01386e60ab1b619. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTPX2562853.