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 0x692a29ffc14752028d51cbef8dd5551e4176a5b6489d2393e6c6e9754ecbcdeb. 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/846d5606-9cb4-4d76-a2f5-29e1d319d01d.json and https://artists.proofprofile.net/proofs/artist/846d5606-9cb4-4d76-a2f5-29e1d319d01d.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 0x7cae1e92c211715de74f1e4d6660683e9192fd866d2ed165ea79eafb4e48e9b1. 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/PLI368673240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6c939ca0a909817ec487f6110d61af81d887995b3390fe707dcd25e3567f5c. 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/PLI368271210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce538dcebde8f5fecf1d83e7a08f6e2d92db7b63264cbecbdaf5c21e0017832. 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/PLI368673330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc6297031be7f98d6ccac31bc3bc428e7a43f7246c989c075c3eb9024a9816e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLI368269320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6c939ca0a909817ec487f6110d61af81d887995b3390fe707dcd25e3567f5c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLI368271210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999d9c27f7898fdb182ac5116872900aa444ea421633d290e55859ab392ebeaf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLI368271200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2babfec4efb82b3a5122f3c3012a5a49514df7d533885037d972d5d9e20839. 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/PLI368271250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae6a300389863bd2396c76189574e50b1ecec475e883741a390614eb211320a. 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/PLI368271260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93822b2281ecb96f9d341e9a05f9ba14544c95f3a5fe148dbe364ef203afb25. 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/PLI368271270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9355023da62432d433b9cfaf4dbcc4fa1e32f2efbe985168df26521ff795ee9c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLUM70900227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508834aa1227397e0e59603aa86f8c69da7e00579b61e61cb823d050ceb93d67. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI368271330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cae1e92c211715de74f1e4d6660683e9192fd866d2ed165ea79eafb4e48e9b1. 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/PLI368673240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3393fb5f47c96a0950fe9153c7a25780abc607aff80697dbd3c8bc0ff3f4557b. 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/PLI366465110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa57c7207cb01d2d187b84d9d1cc50b0dd01ae565157698a7670659dfc85335e. 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/PLI366466720.