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 0x0b1bed40dd164a083f293cae06213303990f6cf02cb5b25b19b499d28b62e6c1. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0b228ce-baac-4f8a-94e2-1179cc2f6ce6.json and https://artists.proofprofile.net/proofs/artist/d0b228ce-baac-4f8a-94e2-1179cc2f6ce6.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 0x30ca41e2e44859e27652d02cfb831ac35958ee052d48bebfae3b86cc9f719583. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/THS082300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c815e69c77e46bbc10bcbfbd125f49add74b3cf37e037fc222e1e6793d6353f. 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/THS082300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96102c86f02d217d41ace9bb0ed7016d854783a48b3acc64ea102ba66731af58. 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/THS082300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23379d5052b42d95661991fcd14afef9567bcd892245f4fc6205f19e3de791f2. 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/DGA062221800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e3bed3044615392fee88d8092095ff8572836b1edc3d739f81986a41f76a8. 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/DGA062225285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64dc9b7a691165ec6f4435f88674cf26343a9f09cc2d8319990dc9ef75304ae. 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/FR2X42297877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96e7f7d10dd9c1264b82703cad196548179767506f4cdb21e48cde435a4011c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRS182102232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54490a82bc6dd3e4e34c31b0181693157142bb230eab7c7dde8ace5b07a7e005. 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/FRX282155383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ca41e2e44859e27652d02cfb831ac35958ee052d48bebfae3b86cc9f719583. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:41:54Z), 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/THS082300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5748f01dc66d98278edf689bb51108d25fe7fa0529bc14aa1e2a9d6e071832. 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/THS082300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0482c764229c8a0464878aeae837b62d93d15c235ab76b9bcbadb82de3c66f55. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/THS082300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96102c86f02d217d41ace9bb0ed7016d854783a48b3acc64ea102ba66731af58. 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/THS082300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54226dfa2a5fbcec4d1d85251e3ba805b048c97faaefaf0ca90e2630a3da2165. 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/THS082300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2e6374e35df40cce0ceaf5845a8f3589da543b65b03fff344a3bc02acee397. 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/THS082300044.