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 0xcebbbdd7633549f7abd63cad336c3d23a971188702a4a992b67b547f065ad085. 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/900c9255-bc9d-4a80-b097-462cd835c122.json and https://artists.proofprofile.net/proofs/artist/900c9255-bc9d-4a80-b097-462cd835c122.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 0x1aff54fc7dac0629221cc335fcb60b35d647b9c004a3b81a6422a2d7afce24b8. 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/GBBKB0920702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e99cc31aa9a2b5ca84d48892b1db52a8a85e036d1bf743e407be9505de2d62. 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/GBBKB0920703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce1c2441a0893def0063ebe3feb8d92e1a72757d2ccee82034561dfce2cadfc. 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/GBBKB0920704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec5df8b4f9d90f2904fadd620d35636e0a30a44c222234979c738b57a46a85d. 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/GBBKB0920705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567db2ffdfbc0c1ad1c08bf6396fb9a8525ab41dc14b044dd5826cb733a7c030. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBKB0920706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4bebc1e21babe2671073fede4806c21e0fafe0585d487034a3aa18e54f118b. 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/GBBKB0920707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2536b0f3516967c5943365f20cb68b8db4a10a903de48af28e30a2d733845a14. 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/GBBKB0920708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b0859be0654928a2d0cfc7911abeca9052c12a0ec68f2a5ea0c6b44d9be083. 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/GBBKB0920709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8baccbb5dee446fd4f5fbc89fc80f16e166c1120c20ffed2c6fc3ab999ac7b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBKB0920710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49264ec23105645d985c07b2b1330ea9ed1b5011f086cd16badbab30ff82b6c2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBKB0920711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa469aadc48845a5ef29f1ac070b359415e7595bcf45212067c47fd15568a140c. 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/GBBKB0920712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757e3f563f7175d00c68b994db3d3a8f48f481f7a411108c5463ec9ce1a050d2. 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/GBBKB0920713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cc0dad95f687f1dfa1263409a5334ac146fcfea456d7d26881853a2ac8f317. 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/GBBKB0920714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d2c5a7d593ca481c61ff6d0e077c851087f22c20da59d4582044edb42ed73f. 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/GBBKB0920715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d4288a32cd57a154696c38f0f80bca99d969b0d8f25b49d4c2c15a938470d1. 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/GBBKB0920716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedcd4c6ae490a8c4d1e80a4ec0760599da68704b666446efc3a89d411351d70. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBKB0920717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231a291e9279448572546569f6ae6c23da7bfb2cf513d8ba7f7b7b7ad775b65b. 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/GBBKB0920718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a414091574433bcf54a8230f5a8ff43e1e855a098dbb45d2f96d4b5d7a8b2a. 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/GBBKB0920719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd117ab3d31ccdc6d977b3a0e052e527cee2241347a89eaf25de7622d66b327e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBKB0920720.
Sister Act (Original London Cast Recording)
Sister Act - Original London Cast Recording