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 0xe65371037f3b89c94f9542c44f7801d06518b28be79917a2410207ff091e05a4. 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/8181ee67-db3e-4bfb-99bb-2a1c01236c50.json and https://artists.proofprofile.net/proofs/artist/8181ee67-db3e-4bfb-99bb-2a1c01236c50.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 0x063e3ec612f702445db9ae25581e16558ea95d43e8ec7bf2004d2f19218b5044. 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/QZHNA2146408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652cfb61b53c8275cbe32e0fe1441c796a3eb7852ff6abdf080a1046b9d67a06. 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/QZK6G2152292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76887c40632dcb91b3184c7efbbad5b15901fc13dfedbc542c75398fee8ff38b. 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/QZDA42207585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff34bdd44ef660e4f436598e721285b8fc3976c2c15a57f9d28205ea8fc8fadf. 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/QZK6N2205345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e09fe7bbff5eff6eb19a87a529cefe0bc00e19fa8ad3365fea041fc6ac0ec3d. 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/USLD91743164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f98e7a40b6382c586678339123c4ee82eded01e729fd47b2e604b00af9617d. 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/USLD91743166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4c4029dab36a3263ca5f714932480b16ff0fdfa2b4145b002e15fbcccd544e. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/USLD91743167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15158c3edf6a9d1bc3077249002bd53f1836681d8b63184e7fd9f31ff3448ee9. 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/USLD91744462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946dcda59a741b0621af553eae98c7c5b639b9df22817153fc4fc83616dc9739. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USLD91744466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0286f65355e58a5859035cfd2d425cc045b04bd12c5df53d172f569ca582547a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USLD91746588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a15f53f81dcb1e164c0f215f084cae462731ef7e3c24aa88be164572ba4ccf2. 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/USLD91752538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ee790e2fda0aaf6a9107df9327ef2914358ae837f4bbbc0888e0edbbb075ba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLD91754646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a457b28bca8c95b5361b952353622a730af8e0781f0e443f45ab69166daaa. 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/USLD91754009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb64c7016046c4aa8c61f9414340a16b6fa9ae24ead6ddd80bfbbce5352d0db. 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/USLD91754648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59751ab1d87a2cad7708c4abc13d0af0bfb70948ad10131396fbdcbec301abff. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USLD91758801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da6f9fe66f777c9f182689510304be6da81d84c75b5e115090667dbbfe3d358. 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/USLD91766176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b66c1c9589d3f52c2850d15490c699d9ae6f1584866b4335d8ceb54b25265e4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USLD91768022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49941fe89e01d87f36a02fcab3ff672d10ebb7dc9c03294bc52b4580406e93ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLD91769117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400472c33b02ab6b64fee2b3cb3f425bf63807c60e2628203d4ec9928104b456. 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/USLD91770367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc152ce60bb5f08df2a05c9601d6b8a024d7a916a02218f6e07e1b7d16b2e4dbf. 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/USLD91772798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc618c316ea99e049ed5ee8d3e443a0ec686babdaf62e7f289875afbef04afd3d. 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/USLD91775199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d82f91b7fa4cf15485fc35b07e23868b32dda6e6b453509b1e60b2fe29c3cf. 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/USLD91775202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc730a8f9e882719d048f4886a08dead3c3e2dbcc2b0a181d9d24ab5d317aaace. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USLD91776021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e219f40c1055bc383666b59f03212fcc070108f78b7857daaaddc20f2da776. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USLD91778645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c795e0645e22ca7afebb541f64a376e1a49ca7b4b9655c97a6ac3ff028204bf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLD91780048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fecb7c9527375f02b3bc653c28737ac4aa6ce36cd670453ca4399178d775ece. 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/USLD91780047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a297d39bb41414e51b505b35c5d304fd250ab638ef9f9298b7a172cbc26f36f. 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/USLD91780773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4be339d4d0faa917c124378b0920035190296bf96603237351d88bc7e0f293b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZWFQ2452739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20adcf65ee50b342cf68d658ce1a500ac1bf9df9c32a2606aaa2b97672cf8bee. 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/QZPLS2260171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b943df5910700d9a8f8a5ce82f848a738d3504f99b2cd53db9de566e8d7088. 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/QZRP42256356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc942e0bdc934765c760c74e207d57f4f0b2ccef9564f0fad717589237a445878. 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/QZK6G2504682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e7efd7789ac30b2ca786bd01af9e52e807da6da2ea63a4844857584c3a2445. 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/QZES62455735.