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 0xb6f6e2b5bc10db1a8a0ea77e265e711547ad02621d08b82c56317a9880c2a0eb. 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/63305c9e-6ca9-4545-88d4-e01bac2ac436.json and https://artists.proofprofile.net/proofs/artist/63305c9e-6ca9-4545-88d4-e01bac2ac436.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 0xe83f9e486b7dd06eb5c629a4ee290edd5d07143ce534178ad73243b83ab7f587. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:52Z), 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/GBUM71701329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c06b1e82527e422e18c1ecf02ae289d8343fb4d1bff64a4645b79baee1df9f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBUM71703672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa1650dd21fb41323f6c3e27cb802303dbf730c7c6403ed8e88d96f7663e37c. 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/GBUM71703676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f50318959c1320441e057c0cf079466b89e16a94cfbc88503628b9798474d7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBUM71703674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ada091a4c5aa7fa094fb89a03f68b93b5da151f45f8cebb9e2da554c71339a0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:41:36Z), 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/GBUM71703628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4537a23280470c09acdddfdeb538c48b5e5800bf6f7d129351e92d8eb692c7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBUM71703629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0fe9da87dac1b12ed5dec5914da64c2c1af5db4b2e5c513f835965cdf6b876. 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/GBUM71703630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cdba103c2f6d73ac04d2823efcf5f3078a0ccc7b79f3498994ebff30b83857. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:35:00Z), 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/GBUM71804023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45caf4805d50cdb053cbf68605acc89a898373260211f3d5c22150d67f942fe5. 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/GBUM71901075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845ddb2635f1cf3da9e42843a7f449f57e99e799c956aa6708a3c3a51c96eabc. 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/GBUM72001358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0309be769f1faaf2200d2d2083899eadae353ce90c8b9c6dd8c716a282d6c5. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:12:04Z), 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/GBUM72001363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d49dac81a9dce37633ecbf70cb6ed20ebd589ebd417102100ed6b4f06efb8ea. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBUM72001359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2058308cc3036b041edff050114e02267cb3c8ce1c4f10675ec219015c59253. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:24:00Z), 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/GBUM72001357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10437f77b302f9d83a5232fb21f8d2f0e216dcecedf35e385d5cc2e13811b50b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBCEJ2100353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc536c93bdc3f6eee8931e300895deaabc121fb531dc4aad9820d9527de9715e1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/UKKP22300291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec733cb761954894e860dcf4b836c0e7ceafbb12b2d042b71dc3960368ce040. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:52Z), 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/UKKP22300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba1ede8117ea71c8bddbe99bb8d6bc1777f66d9f0ef3b92576fea5006f76128. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/UKKP22300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d14658424732507c5aee41368c4f35312bb209c3d58b6391a9dcc3896d4807e. 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/UKKP22300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e5dcc5ec561d4f94f77b9b780e7d51dc134e2a74b25422cbc7e7442418cf7a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKKP22300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e4d5421de64f656a55322222a5e1fb5aa6b1bb105e10b99ed96ea80b2b8469. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/UKKP22300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e3a443fcfa476614cf61dd8a34027f520c8d2a025a6fdc45eefbddf5265a7a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKKP22300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4407ab7f197d69f5a22b0fd0513da42f79034a6328b42248bacea8db251abfd3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/UKKP22300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5031b9d51d49deabeb25aa7f3b0f547604c0ec2dfa6a7d66fb767f40d56029a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:40Z), 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/UKKP22500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ad44c8fbc765df255e3c86e042036012ed1affc0cbb91ec32122d6420e549a. 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/UKKP22500194.
The Endless Coloured Ways: The Songs of Nick Drake
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf087b7cf21d2d06a531df57d9252af18bc3204af1d3df57bf8629411536afc1a. 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/UKKP22300255.