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 0x45c0283afe4b8d44462b2602894856e845c9271a675bc97ebcc50abc94a2e9ed. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fa3936b-9a09-4757-8695-852041233628.json and https://artists.proofprofile.net/proofs/artist/3fa3936b-9a09-4757-8695-852041233628.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 0x96be2fd9d09363aa8374c65fc6999c5d0e2dd645cf0d281bea41053f7cc6d89d. 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/USACU0504269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc7a2e4207ce662b85a8008cb5d4bb5e2a0662ddd52999a05f3fc1278777695. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/USACU0504270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48997cf06055458dc495d14c49d66fa5080c1b9d6769565e738f22d0c7a639e9. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USACU0504271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf3c9457e30dd19fbe3aee2bcdb62568a97c23d0241e7e0a2ef8fcfb73e339. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USACU0504272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da44e263bb94921e342f8af8e5e2d4f9b6550ce80fcfea7898fe11a9d39ae15. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USACU0504273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed3ee63d1b7f93b06feeb657ce839c9ba2eadcb1d906261570c9acd35cda00b. 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/USBAE1100517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e5e7946865af1baa38f334da68e706a67d12669541376c12d37a74f5b43a22. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USBAE1100518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c19bdb5e441f62796b37e4f1e9852e70683a6f6c37a7850b05ab2ad7c4c679. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USBAE1100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ca61c3810d699f97e76a5afef9ed346a919b289c13e1fc02276be28560e14d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USBAE1100520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2243cc2d692423c06d1b7bca0dead07f17a3d8c7cff47daf2f36cf547fc39cdd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USBAE1100523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db99b8cc9ea205ff560dcadc6c41d5c6a7c3f3a3b582d825835a411573c4fa8. 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/USBAE1100528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe297c34c5ed8a3dd4e58e7db932682159668ddf6edb624bc72938a5596f49411. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USSM19910810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05924fe56cc822bdaa0572b69b26aa9665b028910ce2cf4115963b440b42750b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM11801046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9526ebfeb7ebd6b7b4be1146fc05dc3e397e4f932af71e6c0b25f0caafebc008. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM11802934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfec5557a4196b6dae7b56297b78f9cb113ae8f7a0a41d5b0dffd85976bf089. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM11802938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ceaf97a71c6c9c1f87fc2a3b02d4c64cce45d4297c82a4b01eb11adc35582e. 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/USSM11802942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b26e830d62e89692709bbd60cf8af92695d36c2401ab5f5ece27da5a1af278. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USG4X1500387.
(I Know You're Leaving) Little by Little
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba05f3006312a963ebe7b678e959aa03f4e376673d2999d037e42d30adfe66b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USG4X1500389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a55acd19b101e03c5a8a7e912df0c5a0b354f766bdcac5a0f4d4ed5c99a887. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USG4X1500391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29602193594a8d65bf1720af1ad8ffa6021bf5eca8ff13750004f9d83e73fd89. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USG4X1500393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f43f27be191e881960d83586bf240f90635502ec4716e3f77c222677fce8849. 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/USG4X1500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d777d7e5d92e5eaab04db411eb588109db41fc261f66dc0498b5770987cad0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USG4X1500405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe073098dee2fe3bda091480af694081b7feacd3ea134845999c724bd51de82d1. 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/USG4X1300364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe189a6c023d94d0b3ebcd14fc6788487bdea558883bdc3e701088e7b2c0263a1. 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/USG4X1300366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6beadde491d32236a767790aa3ac9090989d51ba3fdb29e5a8fef74778efb58. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USG4X1300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7835dc3acfdbb577a25d1c8d30da68f3609930695ea59504d801ad9d2651871b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USG4X1300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae25562d8726e4e2a9c20bf9da18294af5ce3f8bcb80da473959a2833fd3c605. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USG4X1300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2f54ccb59260b2879cd04bbfc2bd6f13a23a7833160216648db5631442efa7. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USG4X1300371.
A Family Affair: The Best of Butler & Mosby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf48d55366163abf6ea8650d63ab6beed69186afddc01d34d699b140d39a48e7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSM16201189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd554c1a17ae3e8bf2b2ceaf4e58ffd69c9346fd1cba9890c21a4d7385e72259f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USSM19910814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e324b874a6be2fc9a7640787b13d9157ae760f82606f65ecabc633eb7f461cd. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USSM19910812.
We'll Sweep Out the Ashes In the Morning
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064b322fa5be7fe1d45c5575002d583931b340dcf8f6668255020c6be69e2f9e. 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/USSM19910784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d2967470a7de5112ccce304092b73dc57554a3a3ad566e74c93fad07bf0296. 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/USSM16201598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f2c8051c53edcaa970afc1ba6b6aff3e4319d940399f643803360a62107410. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USSM10103317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61335871b1a26b1739bccc644424c2ccb5d8160e0018cac8db7e28099b3f40ee. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USSM16501562.