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 0xa3ea7d6bff5dccfbddfd69120e03d3e2cc84e9cc114769eca41a693eb03bf907. 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/3b0fb555-e164-4400-bf72-6cab9085f0fa.json and https://artists.proofprofile.net/proofs/artist/3b0fb555-e164-4400-bf72-6cab9085f0fa.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 0x962c8787cdfaf4d4496c17d7842c30a3219424f9cf779d7508d532eff9668630. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/ES71G2213174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64197b926776ab01133794424d2582d81c153b340462b3e578deaa929582c29. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES71G2220345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab039b15d2f6e5180f7584fac0dd5763b5d4fe94e3bccf54f74f0049cf6504d8. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/ES71G2204842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5358ac05d00217c9bda012ea70db1fee0266e1f2107c7a478db33164b71e4aa. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ES71G2204843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702163a2372039e8b7a20f0be5c1137ee0f894e1778a2f48d005c632fee56e58. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ES71G2220348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962c8787cdfaf4d4496c17d7842c30a3219424f9cf779d7508d532eff9668630. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G2213174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7d7b6b24ebe25c06ef2ac657fd684e71a8b70309deb9a48d17884ebeefe95e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G2220354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed677a18ed986607ba472b1fb463d3884ac236b979360e2252225aa36bbd80. 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/ES71G2403096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd095d9023f65638ace74c4363772f62711669b48bd653f86eda77f4fdb5116. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES71G2408513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94bf0d43f4368c2c1f0271e56a41280dfc209c3573ac1d39100c3d9671a644b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G2409820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e302785a468cb72b29ec05d355cacb3a87f7d76196becfb294b6c60af5518b. 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/ES71G2415579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4845ab9dee8c117e9d5043fdc9d7a452805d54d715ad30d9ca62e3ccfc8cb0d. 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/ES71G2415585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94bf0d43f4368c2c1f0271e56a41280dfc209c3573ac1d39100c3d9671a644b. 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/ES71G2409820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cafdf4c060b924a085866502c20b10a666f80a0c300c11f6791bc2f2f24771. 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/ES71G2415583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176323ee2471b20256c764aa176f85874dd97fa623fb1f74ec9938ef8d6bba01. 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/ES71G2415580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175e85bf0053d1fce1029de009d0a4f257af482e0828be0efba792f65d44f60a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ES71G2415577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013cda3405088f28b831f9b8a18b101c6cab59b47c2e8e79bcafe59305296918. 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/ES71G2415582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebab9e2ef36c396877d1b68dfa08be7a23ea82f41464937853a668d40f5093f. 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/ES71G2415578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79276d73e370aa528741b52997b9d43fc4696ad02a686b1735fe64eddd0dd7dd. 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/ES71G2412759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df1a650e48f960015c564085d7700df31daf78257f1e5b88b1dd74b30f3f4c9. 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/ES71G2415584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd095d9023f65638ace74c4363772f62711669b48bd653f86eda77f4fdb5116. 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/ES71G2408513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc928c2f65961b0e58d5f3e639348764a167770bc7d31b31f4a2b7e1ab2e85bc7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:31:41Z), 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/ES71G2415581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadf6d584a7bd9150ab19f97d52427ddbc1aac9a93642f8de6bd7d987c056c05. 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/DGA0S2403029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c38f248bac6ec51374fb5f82992d02672d7af52ed25d472101b2fc149e9c90. 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/ES5152400955.