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 0xe0244e58c3e093d474ce2454d20f68b85b89098d285cc3323cef58517060de57. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/502c22f5-1d4f-4c68-a256-7b6b91944313.json and https://artists.proofprofile.net/proofs/artist/502c22f5-1d4f-4c68-a256-7b6b91944313.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 0x7d042bc90bfa7c5f8091c3aeb5bd87c2a77410c4a7a07dbea2a22bab7c089491. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITG272400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1a4e46d8d7281ab7580468c9cfcf8f39446374988915f26da59bd55371d9ef. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITG272400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e001d9b323a293b7211c182a53e58aa93a6adc20b1cff851f41e6c708bd16da. 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/ITG272400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fff4a0107f558d94e6c027e74aa8da48b90f76436a72d4dd994a7337083f608. 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/ITG272400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaafbb186ce3063aa8132157caebe5e3c29b4d9e95ec5e87d4b7de38c34b378. 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/ITG272400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e5f5fe529fc6970cd79608c3288f9d591ebf76fa4268f40fc6751e1fc4263d. 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/ITG272400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11d344a0c09e83eac9e5e4dcff9875510f7a53af82e616715b8eaa4402deac4. 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/ITG272400415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0513686956f25137ec857528de3dd37890452628daf720a7e2100cfb9c0162d2. 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/ITG272400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b350965b93b54d4d97d78adda4452e99bc67b5bc4d4cc8d1ef7f0025e35a090. 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/ITG272200966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87662a6763d4c3bcef8dbfcc92c485377251fd1a6b5aa5b727c76b1780d65393. 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/ITG272200967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7801d59d4952adc5cff594adf5784eeff6f05a46680fbde7f03c88e460a951d8. 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/ITG272200969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffb2a4def79bcbc408406e3342b19aa2780f5ba65add2f93bf3dc7e98565ff2. 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/ITG272200970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958526653e4028dbbf92f0e49c4cad38d4cb2827768272b3df36dad9a2c72dbb. 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/ITG272200971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745ae35a83e85539702921e1073f0ce32baf00c4b69c52d9b1425f6a55748450. 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/ITG272200972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8032a65eaeb4d627a4ad5deebec3aeb261b9a280ce2766cbcca0d28c5f8cf2d5. 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/ITG272200974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fff4a0107f558d94e6c027e74aa8da48b90f76436a72d4dd994a7337083f608. 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/ITG272400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0513686956f25137ec857528de3dd37890452628daf720a7e2100cfb9c0162d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITG272400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7801d59d4952adc5cff594adf5784eeff6f05a46680fbde7f03c88e460a951d8. 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/ITG272200969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87662a6763d4c3bcef8dbfcc92c485377251fd1a6b5aa5b727c76b1780d65393. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITG272200967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b350965b93b54d4d97d78adda4452e99bc67b5bc4d4cc8d1ef7f0025e35a090. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITG272200966.