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 0xd435952ec5ccf9cc448f59232a5d6f1669f4b68a6d88ae650aabf696a1ab60af. 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/981035ca-bead-43e3-b444-b8c0c32b4e3e.json and https://artists.proofprofile.net/proofs/artist/981035ca-bead-43e3-b444-b8c0c32b4e3e.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 0x4793e15cac85bb58a595e517d6447450a03d737e4c4bd2a51d6aeb88b43731db. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/BREMI8900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b17891cc75007bd9dcb84d7177cec3f59e7d7ec522cc3ebe7657e5c4790d18. 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/BREMI8900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9881d21e682690e4cadb214b3f5a81024e6f8b7bf61ce988e860dc9d4e8cbf. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/BREMI8900346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2f267eba8c34db4181a852c370c2ee0e8dff8f452c0e8719f2e4c39aeacc74. 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/BRUM71902337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe032976c986bbb5b2c04ccd25ce783c5394de128842850fa7b1c1ea5f8d0c95c. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/BRUM71902011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502182c131955f33bfea678911a6b260c9069220210bdbe4b8f68180c396c852. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BREMI8900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aefd0eef7f51ee27e9cb670895681c6293b6fe57f95c215820a3f6daa0b06f0. 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/BRUM71902313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2b222c1d28a3417b0456ab0dc9638e748386e92f52993c2c5ed0e76499ff76. 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/BRUM71902315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9238882fdf3f2c6f6685aba953a90e7f7e9f322ffd1b2d6a0f2a611053ed3d4. 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/BRUM71902318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef8fcb230a13ecce9b8e7a84cd55fcc45144b280bef57e0475ec057aeafe7fd. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/BRUM71902325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ce71ec371687ff688d8ee526d8b36e2e6cb5f4ff2ef419f874dd35f31328f7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRRGE9300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539d5d4e1e89e2e97dbf0c7759b6085c8a1f356ba392b20c05ca633a04e2fa4b. 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/BRRGE9300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41a152bed0cc975c1b61075fa6540300629d96cf3ab11dc1a46eaf967705946. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/BRRGE9300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbce2ae7de45e24e8caf58be2535be9419655136b8676714e468320181014260. 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/QZYFZ2501218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce0df2f3f9c45c71627dcc38636cff7c6be25dccd0b4f7c8ded6d1dbc03ba63. 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/BRRGE9500967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753736735a6bc9476a52806e2c795f639b898b2e993a25600554c23ae06b9957. 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/BRRGE9601841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692edb150752737ca123fa5596ff3f6e3492ab07352a15373c43ece0ec2afb5f. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/BRRGE9500969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e9d0511f759a4a66940c1355b3a32753d46c977515f997d7356231e4684451. 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/BRRGE9601843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3a5e286722ab0588bb1953763841dcad628a4ddc3f7b2b3591d1f85ebd525f. 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/BRRGE9601845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069543ce63ffd4fa0d43a3ea3e1e9c33c4a87d6fc7a73a56a15ab7a743f57548. 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/BRRGE9601847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06444571886b10e80be572c2418616c633cb3fa0448ff00efe3caf00d85f311. 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/BREMI9000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05ecc1011574dde87992a53e44d2a2eb9b27a79d897f13661a570c9c864b785. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BREMI9800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b1754a7690dbfec66f5e5485e600343e5181732e1609fb42ab08c38a102a8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BREMI8900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bb9b789ed12f6a4ee9f111997e9b24e868cf9e1b28d5dd93b95c2eef63d415. 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/BREMI8900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795c3491910ff94fd28321aa5271089a60a188544668ed7426470e3491642692. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BREMI8900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1d9b9408cadf926276fc25c5617af02a79b1dc75a8a40ff99c54b78f436a19. 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/BREMI9000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb364b88720ca57c283e2cc1f40290a42f58737c6c35b99f24113d5f89d365c44. 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/BREMI8700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d7ecc6c483fd5b4b570f08acd17348c47ce0ae0b5bc507209bd0a423b9ddc. 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/BREMI8700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f7613342ee11d9215353c3800f19d36f1fec5dcff061157e019abf35aca5a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BREMI8900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bb9b789ed12f6a4ee9f111997e9b24e868cf9e1b28d5dd93b95c2eef63d415. 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/BREMI8900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ba73ed27276c139b6826c7a45183cb1d6894155f2cdee6902f40db0606576c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BREMI8700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c7024a2eae221fd8db40b7a5d18274b26a24c029566ce9b4dedda13189752e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BXP1A1700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a0430494439ccd9e1bd33be0e1901c0f8251e197d4346cc6bce9c78edf4088. 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/BREMI8900343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb364b88720ca57c283e2cc1f40290a42f58737c6c35b99f24113d5f89d365c44. 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/BREMI8700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa360e4b3674c0522f411ba186f7e487689707efa30119d089daa034cf335417f. 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/BREMI8800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bac18fe1ef6265ef3ba1e4fa553e08fb910b9901b3c2c254ef212bebef3221. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BREMI8700038.