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 0x4c60ec20ff0239a38be499089bbd936976c8683863fe0052a8e5021f4e091ab4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/458236e5-8829-47a7-a82b-adebf4d78836.json and https://artists.proofprofile.net/proofs/artist/458236e5-8829-47a7-a82b-adebf4d78836.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Robert De Pearsall And Charles Wood Part Songs
Heinrich Schütz: Die Vögel Unter Dem Himmel
Sanctum est verum lumen: Multi-Part Music for Choir
The Fool on the Hill (Arr. Jonathan Rathbone)
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 0xdbde562e637ca45c087c55a42f660eb97437abda60c8e4470a876d5541640d3c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBCML2435801.
The Armed Man - A Mass For Peace: XII. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0d099cdd6612fd3b6b65f117098880cc5e33254f85418ee060aea84be0dca9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAAA0100476.
The Armed Man - A Mass For Peace: X. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e49b23b561c2e520b0be57ebe12a9539c6261de4a6447b6ad8f218b768be4a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAAA0100474.
The Armed Man - A Mass For Peace: V. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83ad5c7a0a30383b3589704e4a82945c8b250be0529d04eef33910088593749. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAAA0100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c7fe746b26f3a974d4f74463e6e439a85e08cd5a899292b109cb2b265a4d33. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC1000838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0d099cdd6612fd3b6b65f117098880cc5e33254f85418ee060aea84be0dca9. 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/GBAAA0100476.
Gloria: I. The Proclamation: Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a311586fc888655898154ae30fc7321771cc266fa17c3e0ef156edef27a9f8f. 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/GBAYC1000837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e49b23b561c2e520b0be57ebe12a9539c6261de4a6447b6ad8f218b768be4a6. 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/GBAAA0100474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83ad5c7a0a30383b3589704e4a82945c8b250be0529d04eef33910088593749. 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/GBAAA0100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a311586fc888655898154ae30fc7321771cc266fa17c3e0ef156edef27a9f8f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC1000837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0d099cdd6612fd3b6b65f117098880cc5e33254f85418ee060aea84be0dca9. 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/GBAAA0100476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa688845fa6d8f5db024278b1ca78da608504f7ea5514b1fb5461c76e7acce06f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC1000840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c7fe746b26f3a974d4f74463e6e439a85e08cd5a899292b109cb2b265a4d33. 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/GBAYC1000838.
Gloria: III. The Psalm: Tehillim - Psalm 150
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed3c779a90887e2e305e3c5e552d24ea946e71a4f253c5a1ba0b4d3e8c7a1e7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC1000839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa688845fa6d8f5db024278b1ca78da608504f7ea5514b1fb5461c76e7acce06f. 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/GBAYC1000840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4343b8ac017bc62bdb9fbc8b947555a316272220fb346112ffea6c493f064229. 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/GBAYC1000841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818051e63c2ca685db7957778af33ee66b6931c3bec7a8e0fccafef4beed4e5d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC1000844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5e7abac877dc722e218fce986638eec71261d28bd8b84fdbe4613b347e1cdc. 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/GBAYC1000843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dff0e0cbeb72e782aa08eaad855dc3de2188dc44360378f02cd199985bafc8. 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/GBAYC1000845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aaad2beba7709ae77df9d0da121adde7bd3b6dc7bea3b5faadfc028bc74888. 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/GBAYC1000847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35ecb0ab12a9366a736ceb01e4cc2db33dfcddf6de2281ba2e46076c673a396. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GBAYC1000846.
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