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 0xd23f8262b73c8e0e4fc7556c28359b193f3c8aa2d77d0636ac92ceae4cca39a2. 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/b9f780dd-67db-4b2f-8f75-bbdf1f490e47.json and https://artists.proofprofile.net/proofs/artist/b9f780dd-67db-4b2f-8f75-bbdf1f490e47.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 0xaddb76c246abbba301515476b2f2cccb7b4fa9e0ec395a1a83065f327d93849e. 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/QZHN42127939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040221ad4dd459d44e83ab039b6749dd2ce5093e15fc7464f2b6cd678356419f. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHN42128900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9206047dc721b14c17d7b0771b0f6fc3296cf8a7643a88877087a78dd6149a4. 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/QZMEQ2183188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d81a112378f878bc4ca6055542626f5c1291b2cb032e55f447824bb74cc577. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFYX2221292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1cce1b454f54dfd7b11ed33aae4177a440c0e9b9dabca921cd8734d35add5c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNWT2120450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c81131dc3585776ab7cd3b41cea01e76392ba081a9931e7c249dbf2820d2782. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZDA52279822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec99d9437d483bfa99f10cc7a9ec1a789f29c712a2f4d9255fbf23d8f0d2a2a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZES92270285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9fd3e261a97b3d164d6c712638603ff18b01e9f1a60d69aefa719aa72eb581. 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/QZFYZ2482368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa186361d4b95691d42a476b4250c207674fafade79c4d98fc393e1d2ebef915c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QT3EY2495355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c1a00ef82993666720403d6315de296e57fbe66ac0bc4656749d31239f7819. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZDA62564155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6005b2693a82b40e26b1993a287d5136c82b0258c1b881c4a70e96c12304ba. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZDA62564156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeed57690bb552ce748d17e301e905e517e1216cdf69c24e61a2382cc3e72ab9. 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/QZDA62564157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c382e9646022d96d3b3f854aa2fc99d13446c8d974d4c0098e33c0f2d482cf2. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZDA62564158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d8be1f8e113a0813f0a28322b033031c9f954bf8034eb69d67f1528545a43c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA62564159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396fd835ae9d829635d9c7f6b279f68e62b3681a58a826808dcda3d8013ecfca. 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/QZDA62564160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ff45159f3b2257f20637a65d0507a2a9057387f73e0744e4ab0f18e4019af4. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZMEN2507015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda55dbbca41cb147ba2d55a42c99ffd50bc61b7f37f35051e18c16f4e5387849. 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/QZMEN2507016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76da4faad18d16a8156467e474192d0b64a27fc2ef4d089cafbb4104c50c4f4c. 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/QZMEN2507017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101994e0a356f04eb4536092f531c18935f269c0c29d3d12e9a9f6f95f85a6cb. 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/QZMEN2507018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985229056189cd0c938f57c3246c11b55295c6eef9c924eb2cecc2fdbb09038b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZMEN2507021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111c23adad08f70d64f39234e6d257a560f3bf0c2891992cf62a66f5fcc288f5. 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/QZMEN2507022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e76ff355c3e66ec6c5a3ee26ef62f7a4c829ecd14c5683242c3df843181b08. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB42542799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d6a8bf6d8a7abd93dd0150f9206510afeebe43d1b31c0b4d3a18015ad02f3a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB42542801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5942daedeee5ae369ea6b52feffb8522c76dac84a5c3b9d38862f27c6727dd89. 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/QZTB42542803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27be65caa7a0c646d749cf93bf90226f5e359d6ec2c10ae40c1015e83d4677a5. 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/QZTB42542804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabe42605de88ed7968962d1d185428e4bb1330feaffa9bf281e2143fc49f816. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZHN72257039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2986a653c13b0b5a4a8e1641f81d2425ea77e2af09520c10791c5942158e13cb. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZK6F2151094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6588d5e81ea6ff6c39e7d868d9bbf1da8e3cd2d61df5a5eaf776128042b1418. 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/QZTAZ2342292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837f6e16e8fd070e80a10b7f06bc41afe927548f06072b6b8a6822ff38f2ca65. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6F2157023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3a9637d8a00ea8cdcc193e8a3a2cef63015fb1d3fae08aa71f8cfd38cdbb65. 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/QZWFP2386758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25acb283e5a24e507fd1692a213bb3803a5176b914e89030e9c8b2c0b7fb72a4. 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/QZK6F2584719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499acb03a4e51c6a70f23c9db846aae1b013768ec6f3858a9e5f1aae39a08886. 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/QZHN62598912.