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 0xdb2c4a6b8ceb6186f673c050e14502e28b5295136ddf60eedfba48fe0b413c8c. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f44d081-db80-4a00-accb-e30868a581ee.json and https://artists.proofprofile.net/proofs/artist/1f44d081-db80-4a00-accb-e30868a581ee.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 0xc4210e590f43e838ab0b7dea59a72e1615ddeddb1f0f3fc7663059167f21033b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA370563566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474a33a129106964429b05a353099707e4f9c31de44a48cf8ff1690e57c0e018. 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/USA370524188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba51751b973ebb1a8ba761fdf7f848bfc3d99cfa2b4b198d952f34358c75892a. 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/DEB639404601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc51582e8a4f6afd1eb0320c70d1ae0245e64fc0d4864ba06067002d21d85987. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEB639404602.
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 0x0228ac602f114a4a75b04512115cd40a26efc9949c2a4e3678395d55f7d1358c. 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/DEB639404605.
Paganini, de Falla, Piazzolla: Works For Violin And Guitar
Villa-Lobos: Chôros No.1, 12 Etudes, 5 Préludes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c22fb7d46f2c7600e43dc23c87de118fbc460fd8d337ddefdcb1aac369346d4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA560637621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ad3b33329fe4faaed36eab52f4e403469efc24f003f77560b83862dc5d4363. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USA560637622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c89c560c21bb692a7dac6fbe1393634572e6f6b2efc0064b61476305540f206. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA560637626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bc6a0f8999c4f9cabe17194ba41940cce0ea60abe5d866e31db8f5c82eb5c4. 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/USA560637627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d80ddc0928df017c85324f77a0ca892c74182455a30a0548204c3b055f944. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA560637630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fc67897391f801af05bcb25259a03264d92bdccde2be5e309406d8c04438ea. 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/USA560637631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e80942c5e0b85262d04e6ec46deef2ccc9fc9feab315ac2a6ed0ffb41c5049. 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/USA560637633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600c57abf7041d04959a1c54091d715ccaedbd0ef5696c3ee3178b6b98005c18. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USA560637623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823df50829b690cef4923ffd8d0515b5fea57849af08926aed82e3518529c1e7. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA560637624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547d605dd498328f749f3d47c787d7f6bf04886b34c901e22f335fa753619c5. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA560637625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a456212a1e9602bb83e6a328e99fe9169650fa0654bc825fb37d8fdcdd91d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA560637628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d5299708b062ca6528dcd576be863cc332de143adcfb4256d50fb7fad4412a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA560637629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11e2989764fb17c0424226855dc6138fb0add138cdd80deca3f464c59858a24. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA560637632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8be5f6c233e0f0ab3a7dbcf4d3b6ac7ec9fe55ae9f9b3cc7dbdc7452906bdfb. 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/USA560637634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d1e6eb53ed053384d508db42734f9651ee8b39aa2af08047333f983f41a6f7. 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/USA560637637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f55592e0c379266754f6216fb18d21981997c65193033a3c3dabd004000449. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA560637638.
Brouwer: El Decameron Negro & other guitar works
El Decameron Negro: III- Balada de la doncella enamorada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddc890e1dd1e0d71f11580dbbef8f28084eda403eb4c698d5476dfab6ee826c. 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/USA560637701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018cb010b43b1255304ded0a142214527905820035d7a5749eba3301cd9a5ac1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA560637703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ebfd319920fb0d00a9758f192d51b19f3f3bf86144d218b59fd296bdb34046. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA560637696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba155afb1d72f3b742ab89401a07631e7c018005fc51e76f52bfd68f31a69378. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA560637698.
El Decameron Negro: I- El arpa del guerrero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa671e07536de9546ad5008b452dc5a44200d93b7bfaf54ee69c10739d66f2077. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USA560637699.
El Decameron Negro: II- La hudia de los amantes por el valle de lo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b174a6e768f1bd287196cc32ca1ca38d7daa66a599b5eaaeaf02fc0b0b51e2. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USA560637700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1806dc9798224f2f6eb0735a3439f4192a2819b239d82b029e679c6ef06a64d4. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USA560637702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5716a95ab2ebe5842e7adcbf55048d6d2b25616c107a9bb1dd7965b3df88c6. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USA560637704.