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 0xb5c5de20536233732f1ef718f3e16a6617d142176e96028b2588c94ec3b3b82f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9399882d-16cb-4bd5-a449-3f0a056e8dbf.json and https://artists.proofprofile.net/proofs/artist/9399882d-16cb-4bd5-a449-3f0a056e8dbf.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 0x515135fc8001be052aec8bf0866b04e520c5be3f15fdb1d76d1815c84ce881a6. 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/AR48B2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ee093829631e0e0bf470fb4ec9db6739ad34f9b5314f0b0296056c380c2f6c. 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/AR48B2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9d547ed55e284099db6a4a50cf8593c99ab5c1e530cacef30d5dc102ea9bc1. 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/AR48B2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fce16a18265d851e39aaf40ef795ab50d1676b3f4fb937356a65d12417dddc. 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/AR48B2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bebe8bfd5fc69d7f5c2e755c7177322511b73d5b4367cd0a38a3e7a4ac3081. 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/AR48B2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440530246ee2a7153b8c28c60c10c26346c86414162f3ab19c262f809275ba41. 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/AR48B2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6178381cc894503ba8ab38c3e6fd42771c83485e3ac0dfc130d7fce675464f. 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/AR48B2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83395e24f77dc807a56f523ea2aa49d77c8761317ad1cfb1d8a6b9e002280e6. 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/AR48B2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc320cd993a199c3a0f8106d85672053dfe2ede681ce0c0962c3e7bd129833c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/AR48B2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5055f9fca0959d9bc8045ecb12af8065b46eaabcd16799a340724a15bcb9e280. 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/AR48B2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807dfa25e512c4768708fc6954ac5f3a8edc22e25c70b1bd324ab17f4f506f6c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/AR48B2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44dc489699a9ccb5ef3903fd72bd28674ff83e36b242c27d9b55aea75542584. 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/AR48B1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d529315fa11b423f68fbbfc8cae3096d033e057751a426c545a25a1ef8be0a. 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/AR48B1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e15fc08f37eb6202f9979c61d840bf5de2022a2c18075adcc104391c4059ff. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/AR48B2200012.
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 0xd2c210c53641a2490683fd8cebe491201995bf7129c67fc343ded05f9ff0dbc5. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/AR48B1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a40f6e1f457491f75fd3ed66c2f627cef334f3abd73b3e426c8c1b0ebfeeb2b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/AR48B2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec97d4323ab62da0a0f4a80fe03d1c81498b700c31f42680aa4be3a6d78df2a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/AR48B2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6466d593a4e56ec908b6ca1fca78758fa2d9e5ba10f7e04f0f85b48a1409c15. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/AR48B2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b78629109c6fd15fc2f07121bfc29420173e348735cc81f27bbef9825d6ae69. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/AR48B2400019.