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 0x470d6fd56ed5d6dcd25db78d76c25eb459f312bc7df8a8a6d3e00373fb3e3a46. 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/44d894cb-1e47-404e-8d7f-81a5d60f2058.json and https://artists.proofprofile.net/proofs/artist/44d894cb-1e47-404e-8d7f-81a5d60f2058.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 0x730b58246b593b31cd0fd3802e06664b2e15324fc60eebefd110d83d8f900964. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ0609522.
Between Earth & Sky: The Pulse of Celtic Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb28090037a034351208eeb698f63b1ee0a7d33e07aa575209f41e111f5a43d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:09:39Z), 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/USMM70422105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07122a58ca4dbdc8e0f4ff00014e4fa3ce31c9eba4b3b8fd6ab459fd9ee90f35. 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/USHM80767353.
The Savage Wee Beastie/Limerick Lasses/Bird in the Bush
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25179cbd096012dc0ea51fd1af3e62452ddf695fa515c37bbbcedc181537b1a. 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/USHM80767355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60129e390e72c66d99534af1caa85cece6fcac489ca440f80beb77da8e0affbd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USGRX0895201.
Old French / The Wise Maid / Swinging on a Gate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920f75ea70d9adc222d299f5354e231f9167f6bfc3e1713910d93ecd7e0526b. 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/QMFMG1467035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6f4a6071b1cf664d5e19d0dfee2a634cdf36f27b3b9af51c08a9fa272539d. 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/QMFMG1467036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54983523ec142a9db6abe7d757d26b9642434330b16e5a03b7ae20076fb8f6c. 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/QMFMG1467037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c3d37ae3369c3eafdc5df424a85da3a452dd9c5a3d538ce8a3731edbc4e85e. 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/QMFMG1467040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc312ddb718c333206e988f1f4ddd721ec9e8deed3e4ffdc0ca50a3433a40db72. 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/QMFMG1467043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2585a5288f2b91ad6c4a775e653b376bea7cb0d357e41ca1ad6da6bda491f4b2. 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/QMFMG1467038.
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 0xadff72f88549f87e3254fbf58dd2e841f0cbf42f02fea34780c9490231ebd7cf. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMFMG1467039.
Arkansas Traveller / Little Rabbit / Miss Macleod's Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fff7e26b8dce471a2359439ad0d724efa599304db502cc9835b60b7f6255f1. 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/QMFMG1467041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a6790d09c8f9feb8ebb757fe2fe2c1f5ac8599d95e42bf5f885dce03597777. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMFMG1467042.
President Garfield's / President Grant's/Rising Fawn Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d3f9389ce25089fba9a15192effa5a64db7e3f9ff2d51fee7945c5207d6cfc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMFMG1467044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469b189aee0e9bb5943ff18bfaf698df454f42c3be5053adb25f321e6a80e984. 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/QMFMG1467046.