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 0x4fe814980b8bedb83d6e3b6bd4c57ac87969d5f9a10f2f8a40418599c5c5657b. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f661b5f2-5157-40ea-9cbb-61f914eb9db7.json and https://artists.proofprofile.net/proofs/artist/f661b5f2-5157-40ea-9cbb-61f914eb9db7.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 0xe187909a73090563a17ac735e417799bde05317422ae5e349f5284f38504137b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBUM70817640.
In These Stones Horizons Sing: IV. In These Stones Horizons Sing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6dc61db6de6ad0fc75bff184d1115af42dd17cb278bad09fde8763c5198e09. 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/GBPFW0701703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a476df6409b356eb87b83c2be63c3b6baab332c0681fa2d4c712564e65c99d. 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/GBUM70909132.
This Land Of Ours: Cantilena - Ysbryd y Mynyddoedd (Spirit Of The Mountains)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77da4aa33d1869d64edb14207ca084c35c4fcfc3928c918b1f6064a0ff83364e. 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/GBPFW0701693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cd645c589b8770341b3628d1cab7283dd1a3586390d00c8f5fadabc09725ca. 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/GBPFW0701692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6a3fe97d1c4bc299ce544af2072a12d962f37adf5ab36c88115e208f789b01. 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/GBPFW0701694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5492975a2d5e6a096b0e463933fa06dc85da93843fb057d08641471a711672. 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/GBPFW0701696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da983d5dd6152ae59846728874b4b6f8809f884e23283fcfea5218bcd008964. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/GBPFW0701697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a988862ebe6cc02e5ce93104197db48acbe7023f540f7cbab4aa5bccfb389da. 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/GBPFW0701698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c59060c908d5b9e768a1c5877fe258cf41224d83db4e35fce34293c6a31363. 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/GBPFW0701699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb705520ba323bf5bc13e16f7c778fc2e4e5156380cabbb566001bac454d6761e. 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/GBPFW0701701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98b0a72b37e547994babb3c820f4f725837517c5e479af46593b95f44c83586. 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/GBPFW0701702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6dc61db6de6ad0fc75bff184d1115af42dd17cb278bad09fde8763c5198e09. 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/GBPFW0701703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292ab698e76fbb2354c361b808d0be55932148b039d8a8a763ae89fd500d83e8. 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/GBPFW0701705.
The Armed Man - A Mass For Peace: X. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6850d21ff948ed4a014bad4a90a43c81328d5f4ceb82368c527a38ef30f96796. 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/GBPFW0701706.
The Armed Man - A Mass For Peace: XII. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d417f3c7a06856b850ac755841581663caa6c10386797cbab30978a26bd1db. 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/GBPFW0701707.