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 0xe06d26c0ba994825f83378334d135deee086d43503e4872c03265f0e8f716dca. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be6fed2f-4a3a-4859-a60f-676a4e022400.json and https://artists.proofprofile.net/proofs/artist/be6fed2f-4a3a-4859-a60f-676a4e022400.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 0x021d0679d87fb9dc3a101f57cf801de649f6aac2213268ac42c63ad247e0b288. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHZ52092912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61a77c30a371c7d9be00ff4971c901a9243f52bf4e7ea18510d7860b2468fbb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHZ52092951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f9be2c6b734e1427665941a5fd06fff90e2441a9d74947d1eca316c9a6b63d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZHZ52092892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e4a6163f9cf5f58c125442f2c5483bacfc35305f4e50b2238a780632795dba. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHZ52093085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f2024e434605a8ad4ba3582312df475d3ff80542a7d19711e39e181bbde4cd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ52093087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e98b1aa698c5698295ab9c0f2b9a9fdc69dfd6c51b16a6760bcaa09ca46c52. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHZ52093086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e317610f294a140ca928faf983a779fc51b91ad53cc4185b82417af7b702d71. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZHZ52093089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf30c042f5e5ae08f38d44831b3806640311be933e71103a2bdee9da71ba06e9. 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/QZHZ52093090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cc132bf7bb1caff5a28346850507fa4257144768047812fa8ff73dfba6e02a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHZ52093091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa9ba7fca0b998681b82fa8aaa1f1e872df63216a6daf650e9c6c960c6e1653. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/RUA1D2170750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bbf5cc89e2eebada843d29f39123e988930ccf01de5aba8057aac9295c8b8c. 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/RUA1D2170752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e166963eb60faf4fb70eec5b2601435ade653e50a13aac362321922983e5fc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/RUA1D2170753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b5e5b2cbe6df3b64336f6118567b1225140c2cf8d797f132329b5617bcfd4d. 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/RUA1D2170754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d65b5aba0f5467180e181d795365f7cea676ccba53a198e5c0e31805138eb95. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/RUA1D2170755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eea8fd08c2c481a215ef72587cc27be92e2ad9d8802c292d94c0c710ce10de. 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/RUA1D2170756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe545d1d40c470f2626f839457e8e9290abed0449cca58cace9b6af982be3740e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DGA0H2497012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f83bb6c3c3d13afd8576cfe3dfdb642083363ba35400de0fcd0b908976c1065. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DGA0H2497013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb62de530607a3ea0e00c538d14c0641c3b539e371dc8f3b26dd9d50589bbd7c. 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/DGA0H2497014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ae03d6d478fa3b618ed5678079b63271e7cfc782c931df9044caaa85c165b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DGA0H2497015.