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 0xc22f85e7cff3b0fd7b4550a91cf473c79624d9cbaf8671997d1f89b85c864b15. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/044f4987-11c6-4346-a4d6-284e5eb0b1f4.json and https://artists.proofprofile.net/proofs/artist/044f4987-11c6-4346-a4d6-284e5eb0b1f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Sprig of Thyme: No. 1. The bold grenadier
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 0x113db54e748b4f5e4d8469a65d840c3ff97a2a586d24a7e10249fd73bcb89987. 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/GBAKR9312008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2dcfe53f8a9bbcac3d5fb2fa153e0a90e670b7f5bcfdbea400d14bc3edb36c. 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/GBAKR9312004.
Rutter: The Sprig of Thyme / Vaughan Williams: 5 English Folk Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113db54e748b4f5e4d8469a65d840c3ff97a2a586d24a7e10249fd73bcb89987. 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/GBAKR9312008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd805990ad568a85fd3d6364bd49da89ecc442d21d3693d18c1bb4302d8699a. 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/GBAKR9312011.
The Sprig of Thyme: No. 3. The willow tree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a6fbbd0db6af168b52563a970ddd704f791877bf52f205ced99d22f13c33f4. 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/GBAKR9312019.
The Sprig of Thyme: No. 4. The sprig of thyme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0453f8319d32f206bec2522a4b525a77feec0d21c49b5cfc96ff074bd1e8ade9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBAKR9312007.
The Sprig of Thyme: No. 5. Down by the sally gardens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2dcfe53f8a9bbcac3d5fb2fa153e0a90e670b7f5bcfdbea400d14bc3edb36c. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBAKR9312004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ab6abb82d7737f0bc77371471463f2bbe571e9306d4725a72c063918bc85c7. 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/GBAKR9312014.
The Sprig of Thyme: No. 7. I know where I'm going
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33724199570602a05ed713d47adce52a8818fbb333ef3557cccfa2b083961305. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBAKR9312001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f1dfb0f86984a9953afeb1341e0733e07b6b14ada2250767d6a5a8ee0a8e74. 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/GBAKR9312018.
The Sprig of Thyme: No. 9. O can ye sew cushions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3c046188fc79fafe9ef27373e948f63eb38bd4d52c107af1b5614474837f62. 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/GBAKR9312022.
The Sprig of Thyme: No. 10. The miller of Dee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ef3837607b9a5db88140f877e2620f33a36700000a8e7c85a567e49ae67e9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAKR9312021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5821c826e59c0a4490395e3064595da816f51b6d24434649c76054ede6d9b4a. 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/GBAKR9312023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf127cfa424f4a918e921a8aec66ccd2e2e5c0961b64c9919b5211c0d225104. 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/GBAKR9011211.
Be Thou My Vision: Sacred Music by John Rutter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf127cfa424f4a918e921a8aec66ccd2e2e5c0961b64c9919b5211c0d225104. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/GBAKR9011211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2dcfe53f8a9bbcac3d5fb2fa153e0a90e670b7f5bcfdbea400d14bc3edb36c. 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/GBAKR9312004.