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 0x7511881fa4279c0d617173ee8f283315cd8141ae06ee257d8121c9e40f0d6f15. 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/12b8f1b8-083c-421f-8e7b-9e85971baa99.json and https://artists.proofprofile.net/proofs/artist/12b8f1b8-083c-421f-8e7b-9e85971baa99.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 0xd9fe9625b989114e2e7dd5009c8036c47a48cbf2d94676f34aa01ca056cc0e7e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUA591901584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefa918c5caeeec3cd89f55e3c082ab280f2ac21f0e4ed4325932f47b5b91a86. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/RUB422104372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0707830647677245c22a1b9aaaf87a32884736e10921af32f3bd1a5219bc728f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/RUB422201529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19346d2a0721cce68fc0f734537761f2561f5501abb45c0c5519a47941c8bbe5. 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/DGA062244230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47c16829ff6acc65be43e8eff752f0aacbd6598f0a28c5aa3279b912aef878c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/RUB422203393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676978b59e5624513cb95e979d2861807ea1d601d55bc1707e6f673f4e9df38a. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/RUB422300949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867680408d28c6ccea0468163e6d3e014f1ef5c129dd7ca93c6d2f4092008abc. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/RUB422303308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ee343bd4981d77981043d86509e8b06c27e3e9caed03117e5d5d85a7933df5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:54Z), 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/RUB422400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f099727069c17ad40afc1a160630c4db0f308e15b0dc218e2dca2a35acede85. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/RUB422402123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a25b45fd00bd3765cf99a3de0a7b5ada67537dc5c0ba98c3c87501a953018d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/RUB422404589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda179564526bce2562ad196dd2ab2f75c6840929bbbbcb40dea87939e4c6c37b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/RUB422502053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf76a6087fb4e194a35d9475c2ab4ac565cc43e9abf30aabd533cbd0dae7b157. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUB422503825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4897a171d9c5d3e4df177005df53f473832bda5301bacae2817a022c25432bff. 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/RUB422503826.