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 0xfde63daf6bb7b8561ff3e8eb30b0d9b0e06db03bfad6618f19aee878ad0aac3a. 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/7e6d1553-090c-478c-8cfc-5fea81155568.json and https://artists.proofprofile.net/proofs/artist/7e6d1553-090c-478c-8cfc-5fea81155568.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 0xc4cfbc8a4b0df8c99796a2f60a1ec5ca7860d4a3b2f7e2482e367e3f0c55cb44. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHN52386881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b08717b53407036e07f7c4d6af09af0979c405581b0a5ee64cd2fc8ad238e73. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHNA2358922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b32f4188dd0313316c1e6523f8a4e1f30fe9621ca9aa884c70071ad4098937. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:39Z), 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/QZTAS2242469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ddce65aab7ffe491bc7bde426a2708a8418c0becc6d401e4d74a6ba28077ec. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:49:08Z), 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/QZHN52386880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9562de3a9931d05132f30abb9a3a8919587446db5839be3d163965a0e0f7a52. 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/TCAIM2439255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6cd9fa1f358aec954a2cc9fcc8b5dbebad2436cd77219f6f1a8477fa193ec. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6N2515321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab934d89bdc3975b9526953c95bebb02fd4b64dd885328329708bfc482e2604. 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/SE6XX2580300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cafdfce9961ad9b6a56008f87538adf07c5ccbfeb4ef425c3add60e4fe2471. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6XW2564227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90badd797a99d1e6e69b459538d1db685839429fe50905e3423c34335f21a623. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2368004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa835c8abbe989e879d144b48052ccdca5f6a4540de8adf6e5850bca22e03a8dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c386407a30d19c7cd109d77f92bb0537d5e3eb4d6d12d603cec201392aaf38. 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/QMFME2421426.