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 0xd2fc13f8519b5fb4a74c75f4a8adeb4379ba6a6341884904d8b8d3a70ea2e86b. 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/aa781125-9016-4786-9801-c9f483910f3e.json and https://artists.proofprofile.net/proofs/artist/aa781125-9016-4786-9801-c9f483910f3e.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 0x1f8d29d8beb9a22502873327e77222063a815b6bbaade8da8089d62c8daf84cd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM4DW1814912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fc038ea6745797800617d278e118394adca68a3cdba9d73f88a9a813ed9272. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZDA71928748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17eb58d14ed4a8d873e6e546b07363eb378c4a8d787b975a46462d54c2ae0c. 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/QZES51919577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed853fbe969b7b074f9626358d6b6abdf10588ccefc2522bc7d99e02f64ad9f2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES91927782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef3b5c6c0cc442660fa6e936b3f64f274bfd5fbcbfb22501fcd857b68947570. 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/QZHNA2097170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999f0a119dd6cd9cadb4465facafbcf2db8fe2e573809c8a41056111ea5e84e2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6J2023024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd84f1fd74074acc1d5d54d01e5ecc628552904c2d2ba7a9e377eedfe92b16a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDA82137008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad83fa1d3198cb6cab681cd0100c574f75bce563e791a4d9be60789c40ba6acc. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZK6H2136267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ee29a3dcbb4a04576d51cd58fe0219794076790c1d5b4867da077e3be8d009. 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/QZMEP2137940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbf7dd959f6f15b41ba955c728ecdd09276954630768b600a63778c07d7e295. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZFZ22213390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da4ccee18c625a196e3da5a2c684e7a6baa7f1c246106f2a8bbd7bd08aad900. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES52275050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2509e9e3303842448ff88a46ee2801248f59e7a0c694093b18c30f7c722639cf. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHN52233599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5395fe80879ed175a88eabbd9f7c106145d31c6c54d6c17dc6364568dca862d. 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/QZ5FN2300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0618f3291d5fda5a205985417ab3960515e9f6f814557643ffce236a1323512c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USLZJ2329605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25746c7b0b3bd8c9c3035d838bac82d043e6001a6a9c1bdc939b9cc420c1c041. 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/QZES72440155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d809fe81c2014e5f28c83a017bb04ba9ab91f9e3b8c41eb4076b6fbe0229aac. 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/QZWV32474586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f399ce4f753b196613ca74dec3953e0eb235cff2c9972c701e976472125c4a. 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/QZWV32474605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2843ac03d8b8fbdbac00eab67d19f76cd036e6f2f1195f83a99375a70141703. 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/QZWV32474610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa9639c904957119191885b0d1f412d67932d44b8f6e11ba73af4c2f9851662. 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/QZRP42589326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a42dcb25674e788bf12bca951dd43cb4ee6de1841fefb92170c0f5a6ba1e6e6. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZRP42589327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cddc61f8732d02d8c0d69796b9cef6f17fc74eebfdc73bb51e500802c8ba5f7. 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/QZRP42589328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3b94277b4337c384d876c51fbabc25628799a36b560ad87653710dd776546d. 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/QZRP42589331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d339ca4fdf1f6482d7c4b28da29f8391e30d6d64565ac4f8b57ecccb28ea38. 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/QZRP42589332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda0c4564869e9a609410c9a616fa94a02ece64883460b276ce5def8778b3a5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZRP42589333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123d6af525c0801b41958c9a010a2ded9453be267364893825682e8ec1eaaf7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZRP42589334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5936e028007301f1735c65fe3d93d6ced4a15f655510914ab1c2a5c0e159c50b. 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/QZRP42589335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5de5104cc797ece7dbddcc2e10e7e373de8d7f8d0ae7c19f1b92a4897b09e1. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZRP42589337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fff34d91f9b49e44c8e30b5933167ab22949d1590e9156af99a27bde3b9afa. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZRP42589338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb1eb922d1f5f0c21dac5920914a81464f7d3ccb186137ec085001485caca6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZRP42589339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f447fcf1104230df04fcbd2de045e825a71890652d94025478c375e9af98d0. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZRP42589340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455ef5e0ac6fe2db5c6dc6be58c16072e9984c680c4758c707581a9f49d3dabb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZRP42589341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7683c64b80869ca69cf86a03efb32665fefdbd42619f9ab1e2686587e1b3af23. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZRP42589344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacf91062c8bb43a8050252f681e971475f1dedc75ad75d29d032495019f4afa. 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/QZRP42589345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9270f1e1873500168242a47e38e888f94fbb415ebcba49b71883745c7dfc66cc. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZRP42589346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c24ae39b40648cc80bbd898a7d4b740e8ec1471ddc9103444a482eb14fafe38. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEE862301230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c0a1c82a7681b3d4a30f2830d9c35ed46c64ed782a947356bf7dcebe634b1f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM2PV1876292.