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 0x17c6e2665172bc77d02c7337266de3f15ae527d3d5326cdae4deebffe5a2952a. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/314da27b-556e-4a73-b193-8e75ecbf5411.json and https://artists.proofprofile.net/proofs/artist/314da27b-556e-4a73-b193-8e75ecbf5411.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 0xa16c6b94a758fb647ffc5a04a93f9fa8e2a6c249ef0212d0785a533a774aee55. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:51Z), 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/USDY42339855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e81879d483481d9b020ad14776cffb59951f6ad447fb72dc82de25877b6b33. 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/USDY42339864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b4516e0b7013c5d0418458d8439a88b7a4c27dc33c464939ab40cb616cf06. 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/QZ5FN2517604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc442850a5c0f37f987493bb3a67abaab44d74e5c6f2cc45ff16929815733256. 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/USY242453387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc0c54f13f5628329a7c19b853e8f8f7b1fdb62230d2264337ad2429a433d9. 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/QZZEC2318974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a3b8a3b8955fd362b4dbf593d47e6967986b55ca412457eea5695df3c58a3c. 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/USHM81684718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd7c66b475987fd51b0096277ac6349add866f56bcec86b2b25b5b6128e7df. 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/QZ5FN2571662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d691d5dd6937274f9bc96da1fa5310e398f8520a67ed479b703db6be9cc895c. 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/QZZEC2460292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e8da17d01e0645d56c8eef760bd6228f925082a179430f6c8cf328e53b817c. 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/QZ5FN2571663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d683b35c171f2b7f97dc77b871b8749d0f06fe0b2ecdf6ff369094e3bc17cf1. 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/QZ5FN2571665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4912c6fe1f7474b648a46ecae5a225fcd5e6a7268b28533c391b36291df160c7. 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/QZ5FN2571666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b4516e0b7013c5d0418458d8439a88b7a4c27dc33c464939ab40cb616cf06. 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/QZ5FN2517604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbdb59e7f8cba0ecb2c06dd157ba712da083274a2c2b548390c3eed36d9bdc8. 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/QZ5FN2571673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8322c81142f714e3e2e74b03b9f304e09d96d73670e86361109ccfb0f2b7fca. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZ5FN2571675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26267e1e58ecb2783fd8beacdf9d453dbd036569e23f345f6a21b4255118eeb. 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/QZ5FN2571682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857f132bdbd81df31553ce6c955774f709d69ee00dac477099b01ba0fa9e56b8. 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/QZ5FN2571685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8128a1d671b8d03163153e5d2a9ebd8b58b2e598b18d0ca873fd65b5a5bc0d06. 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/QZZ8B2466410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8790470c57141d86101349b9bfddb447d5e419788ade9389ed2390dfdb8a27. 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/QZ5FN2571690.
Spectrum (Colorful rework) [feat. Damiyr]