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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b7133f4cf1cb548f68cbd8cf7ee010a8f281bd6fdd30957391be4f33dc2a65. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/574bc271-2abb-44d0-9838-6949345abe79.json and https://artists.proofprofile.net/proofs/artist/574bc271-2abb-44d0-9838-6949345abe79.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcb90a0315f8ebe14abdb9bdd6f467e26a5c12c822fda0e23d4593fe4ff9b8a. 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/GBGEY2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21442dd6ab224cda724e814a930718394fcf47e19079d6318bda05d2f81fd9b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBGEY2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b67ac2a05b86f0dd8d8d269d2cae703fec08b70de7d5731c7678e0d8e380fb. 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/GBGEY2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a99be774e69e06a8ba45a9eec706463b7d752fc23fc140789c4da436797955. 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/GBGEY2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7278ede5f93d317f4e5ddc3d22533e1e8b4f0b6ccf2b6514a14b6a11aecceb1. 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/GBGEY2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee688f569692b2b21347393735fd99d5e3ffded2d825fa9413550cf1f68f621. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBGEY2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb656ad17340cc935117d4d09b328886ae5c2d74d57c72762f45a100f9ba600f4. 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/GBGEY2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730272a84967b6aab97c8973176868e8de404b63c792f77ec3a2ae864dd370d6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBGEY2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef508574369742a308a495e33bf167a1a13e4b7ef9e2f373c43eb335c907f96. 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/GBGEY2000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d9a8bb383d15decea37f754543d09a0db7166e848a442352799324b6762b08. 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/GBGEY2000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c7360a449fb8d0ee42d46595278cc5aace7c8ccdcb6eebde0c05a8ee5e746. 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/GBGEY2000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a26208e162d02e3d2586afa6077af17f77f7cdbbbb7c3bd539e89432cfdecc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBGEY2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0109165a1b39d7afc373f0ebd08f3f44ec1204b4baf19ceab95fca07f8b27c22. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBGEY2000067.
Tom Sanders Sings With The Ligeti Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebdcc89ae4ed254c1baa28da37070950c270cee4b53f1b93061f3f6673f6115. 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/GBGEY2000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3167b858c513e0f70f82d90e1d868f5ef33d798a12af8f3b8b54ea9776ee61ee. 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/GBGEY2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf315fa731d7f27b31963fe276b6d06cc91e42461422bbaa0c9baecea1fb0f68f. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GBGEY2000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac338b6f10c701536745734ea9eb341c226feef71819fbe5965e682948456c9. 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/GBGEY2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88def9965bc6eeb65e22c66bd5619467f0c2a476ce2fe61435c7e86b212e92af. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBGEY2000107.
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 0x7d5b91f8f561761ed42e6e143120071abd59265d77630db31dfa6b622659a8ef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBGEY2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb5b40c5094f1f3d393ce8451edc4bc873966b0bd0d987aba88bdc070ca3719. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBGEY2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566fe3a6128b17b93a416148fcd8cbb5d94439d070187c00d0bb1128e9af6695. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBGEY2000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f3090271d90a7dc755b9cd44363bf501cdb1b1e826ba64bc69c5bfcb5f3f2e. 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/GBGEY2000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e257b878b0eb5c62d35fa5c826f615ac140a89302cbce982e3c2e61988cde6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBGEY2000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f065667c01563c7f8cacfe26fbf1731e1d2b127ee42bd63488fa19606610f11. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBGEY2200019.
Time Slips Away - Moderate Rebels Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf245f2b35a8f1e27233a8367d20b9ce3d1c4148207f913806afe9389c2c1479c. 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/GBGEY2000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a26e241157f8700d55811a1b08b2db32bfb187502b15c7488a770c11f0cd5c5. 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/GBKQU2357668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e048733dbfbc32d6f1e200c5b7e9bfe052ca5600ee0fc7717b14b4fd239f67. 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/GBKQU2351858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe23d999c0f6bb4af2f8f0a05d6438a061794b0467303776d1b290e87823b3. 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/GBGEY2200022.