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 0x6a36d77a571b84fd78e19d60e61ddbc6bfc61879cfb3e760804cc487f051ea65. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52e012b9-04c2-44a6-aa27-550cc0173ca2.json and https://artists.proofprofile.net/proofs/artist/52e012b9-04c2-44a6-aa27-550cc0173ca2.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 0x871815677a0c2fa75e6436b724bf09f000687f7ad0e17ef3101f89ec26e00399. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBUM70811953.
Morris Medley : Mouresque, London Pride, So Selfish Runs The Hare, Maid Of The Mill, Sherriff's Ride
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f41e3e699a23dd67798d057e0264b15a3af35a3ae244f6c42bdf1f95e696b3. 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/GBUM70811955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c16b930bcb3e440411da9b0d8cc90098fc0397d06b6c022b8233556d05b49ec. 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/GBAAN7600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248ca4af202a6db6f33640675dc8b42834c51bad954dd7713ab0dcd0acf98b83. 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/GBUM70810831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc037c92a1df73616524853320e6bde9aa0d15ab553f1b8ca723fb5154247d473. 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/GBUM70812075.
Cheshire Rounds / The Old Lancashire Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaac19401630f0f195379aebfd4c527b76d92cb3d33ea0216462e585af06ad14. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBUM70812076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf203f1ca10db8d94d7c2631f076afbaf553b42881459b30b51dd112adc00d340. 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/GBUM70812077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1272f98fc627c2c905d3e82107193fe660a3f2bb01c3f3337ed119bdc698ce4. 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/GBUM70812078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e8ad7686c89543c34efd171d29f969e9002fd54b226f6dc0078b3036b97e0d. 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/GBAAN0300112.
Fairport Convention: The Fairport Companion - Loose Chippings from the Fairport Convention Family Tree
Medley: Rocky Road to Dublin / Drops of Brandy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1998ace3c34ceae0fe732b44f9d02a3d1bf01dff56c3c957b96bcff225b410. 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/GBAJE0402245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86825ccc05551acd49eaf105ab20f4fa8b8b6f2e7a421ffeb573c77622fd7b6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAJE0601767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa253d994cc0a865c7dd89a186de909426f500d9341ec4fc67c352c9884f6e7f2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBAJE0506053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe6e2a9158516dbed61daef3aa62affa18e17181a2911b55121501be3a1624e. 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/GBAJE0601773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229d486c55832968885eab584275e440da3161befb907b34329fd808b0fca039. 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/GBAJE0506043.
It Takes a Lot to Laugh, It Takes a Train to Cry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae8c39c9c7a12b201353d262ac513d6e53c6c4765de59418382e21dce71a942. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBAJE0601769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b87f9895193aabdcd9dce2fec6999ec00edee96ba6871710134475a2c37f3d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBAJE0601778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262aba7d748c309714860767f4425904d4101e97bc1b08f85c51419447dee767. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBAJE0508771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb48e7402e18c65703d985147ef639c0846b8b2a67ed904e1f55bc0d0ed584a4. 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/GBAJE0601779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf13458670ba8b342c29948b12e07b9c0c51536ca3d4407d7a70193bf28cb34d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBAJE0601780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1810e6c8f50b8358937995074514d54ee4909f6da89262ec177d458fb9490aa. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBAJE0501496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6629ad18b936fd5e64a3bb384e7df2f275490531e32ead1ddf68ed8d3b2bba67. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAJE0601774.
Ashley Hutchings: The Guv'nor Retrospective, Vol. One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043f2b6ca814a83453bc9237179749bf07c523902bd78c6b0071f583c3a5cba0. 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/GBAAN0201318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fb5b077a60e19dc27ed680643e6685efb637299637ae1f164042bb1e102f4e. 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/GBAJE0609348.