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 0xa703e48e0256384891f60a57ca17f9d933c73f4512ce0ec4c252eb2f50d3b556. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39aa4616-a6f7-4fde-9cb4-5116049dd35c.json and https://artists.proofprofile.net/proofs/artist/39aa4616-a6f7-4fde-9cb4-5116049dd35c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x2a8400dfd5c5f48abcd23fd5a9839c7c6bd7f3fd3172379ae67ffd64bd6e70d1. 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/PL6A22370700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666433ed08b07ca756e2357f88d2212ff40f4b818cd0824a72e7115c48da899e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PL6A22370701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa403f97cbabf91ecfb092cfe1cea2009bf287da9c0f32ae27a1a5b0189f725d4. 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/PL6A22370702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe326831e3e81126fe16d577d1b9c05d3f4b757c7cdfe8562ad0c1ee8cbb6edda. 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/PL6A22370704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e9f8440f72ce2d1a09ee5ad519f6425229eba190a3be82973caba564b590db. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PL6A22370706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5f69bf10907d1f7a028606e3490f519524f2f98af41ad926c9c6e21938ff7a. 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/PL6A22370712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e43a44741489c5593010a7993451b68d0eba70aaa1e4301a7617c094daca9e. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/PL6A22370713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e343a9c5025b5246e5deee0ae7b32bab382b94e2d8dbc0b36a9e21e53a58f4. 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/PL6A22370714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636a259028e7e38df492f59c3f78ca8d74b881820014634b6954a99912406be1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PL6A22370715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b534d6995ae182ed51af97017d29d08c6c21c75d405d5313913dcd137bbd37. 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/PL6A22370717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844b98dd614120846a349335f8e4bb8b44418cf7e53fda913b46d1907a36df47. 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/PL6A22370718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdddbb1da998cfec7e86050fe977821c1105876b6b02dfbe46f3d8ff135f92f2. 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/PL6A22370705.
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 0xe592c191396b2b45f30a4527d9bd62dc6897cceba7f45736074e8866db06a372. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:00:10Z), 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/PL6A22370710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d631a51454cfe32d0b22bd2c36e5e5624e9e96b1213403c2e74f73db886ad8f. 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/PL6A22370703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd981cd755f71987fddabdee17b74a0e709e76e10f22ac73e5301619930f9e7f. 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/PL6A22370707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d92ad928f63638baab721d216c53519f0ac18960cb354f730a09f57d874a50. 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/PL6A22370708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b89eee5617f6cb318c018964f0dd56ae5dabb7600316b5189db96270c63b7. 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/PL6A22370709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df364563d66c3f14dbcddc645bb4188426ebac8117541c1364effebd93e2636. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PL6A22370711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b60197e2a2273e51ed5f2b7c4d8b1e695802d10d05d03b4513bf8eac36cfdbb. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/PL6A22370716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9318cb50372bbb8cb6273613faca37e790b4e9db0d2e0aac710a4ebc6d1d40. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/PL6A22370719.
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