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 0xdca7c91d605c02cdd242678e10266600d1ef2f56af123a549017741f085e0340. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7f4d4ca-65ee-4671-9a2d-b8bc8f6a21d2.json and https://artists.proofprofile.net/proofs/artist/e7f4d4ca-65ee-4671-9a2d-b8bc8f6a21d2.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 0x251272a12d9f7698d2bb02fc5d0522711930293ae581aa0da76e6d8752f0ed14. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBMA22324963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b04535f60a4af93f816b95056efff746cdafdf4d5784ddd49434a2cc00058a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a658441ebd297d448ba0eed34df48df4160691ce563ec334ceef93686e3b9f2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff399f11c24c4b2da388ed0cac00e99f992f560b7c21bed39bf1c0cda47bb9e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9a3fd4f4654b362b1e2f58a421f76713d983d0bb7a06ec1eb5826b9718fad. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc7b96027fd3748ea32a0e12e2df6d9e3d22889f95cc703898197015b5e619. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBMA22324968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c24f6559de6d014e68ae6a66a2f6ad40d437282f4e0a84aa91e7878f2bed24. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3c03f819e85379c3acb1eec3c2422db42d390a20f81e958f0d27e26c1889af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749569d62657d90b53bae637b13d3f837f255c9cb1d54d75cd272b116f825541. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdabd0e11f1fb1e4fa75e331aa117f288f4a09bc985aeeda88824e16bc4cc68. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBMA22324972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7df6655a3eeba814fc686df96b766d038aee85e6c15394c6f8089b5fdf48d62. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/GBMA22324973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf8557f59bee88588c81447c72b6db1aeb7656604a7cfc76b004cd2294ee414. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBMA22324974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b0508e1c9cfa166dde4a04afa60089dfb4c507ec1aacad5e553ceab8bf19ec. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBMA22324975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c966b726d420fb55a139f2216ed00345e777d1c9d86c6ad902658fb28c0f36. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21cf1fa9d577b71fc6b17bd04168dd78631e3408f1d4fff32333b7455dcf273. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22324977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf412a4bbd068373e3f6f750443f362a648d1d8a24a38de8215d8a1028e3897d1. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GBMA22324978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2654440df7198a0441276fbd291921c8341407fcdae8c7b73becc4045285de. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA22324979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3aad56381a18b25b8c1cc6d68c2be8624f8ec4f8a3d3b8a2d3158620ad7129. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBMA22324980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ba90c74918372450b73257a91c34c2a7a84a27d533ed26682a578cc2568320. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GBMA22324981.