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 0x1757fb7d87c44196c26949a5dfb72a55995177b513a5778e63851faf137e3bc8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d817719-807a-4e68-a43e-cef469f5ff5c.json and https://artists.proofprofile.net/proofs/artist/5d817719-807a-4e68-a43e-cef469f5ff5c.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 0x2655694b9953e76d8113a427ff8d1d77fb4d5cd2d7db6574c7399809f5982df6. 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/AR48B2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9851c7ca3ff4eb1e65986029deea623f3d8ebe937c0e5db7b91f1de1ebcbe652. 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/AR48B2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e4a826026ac103ef42151fddc7822c31d836f7cb11cfbb3e3c7d0e92df56f9. 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/AR48B2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7bdcb58a3a2473a80b2b6b1f540d96d7f8d50b88215608b93cd6fb19726c9b. 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/AR48B2300002.
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 0x2adb6025dbb2e01b4d121f7a47c80175ee4d4ae15f1a31173f65e77f127cb343. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/AR48B2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026fcdeb8dcb1ef5dc3a2d8e0a6d66010ea6a2be7ca635e36d5fd4e029d660d5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/AR48B2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc619710c08a1705a5980428a27a153769b4a0a0b0f2b8fb48d7677d66503faec. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/AR48B2300007.
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 0x1de0a85b7bca299e770bec9b062f446a5382be2a3b653bde10be29c1b3a640fd. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/AR48B1700004.
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.
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.