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 0x4afa864ac03041b03d62921a7428a8697ccd3fdf3e53c1f5e3f522a1ba3a4281. 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/c4ab4c7e-a92e-4159-a6ae-548a17714c27.json and https://artists.proofprofile.net/proofs/artist/c4ab4c7e-a92e-4159-a6ae-548a17714c27.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 0xa9dc50e5df606f414824120931b1ad35e7c340f1aca3a974c706531f3a2e7924. 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/UKXN22328705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86471773ca3a19ea0470e0fd62968e611b2b92cf3d5b8c59a1be0d99053641f. 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/GBLFP2339296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372e27b254190f59eca6d3d9de2450194f26bced87e42b9dc6cc048780a1ebbf. 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/GX3Q92374126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b8690b1a965458e416344dc2d149073a1f43e2e7c4ebc8e2f1952fec5f0e8b. 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/GX3Q92332321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf002ad1665e8252256cb161841915cae82c1c0abd515955eec04015c9ca053f8. 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/UKXN22158398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765618cb73115e001c06c7b14a1508691ae3995033b299d1f950875ab57b8ee7. 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/GBMA22161624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa358d94e4f13edc15bc340e6bf3ead45294d557fd1c564e5e99ba4cc9a455aad. 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/GBLFP2169098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b479caf014d2ca08f7c3d08fdfb561f63f69e9f07518f36b32217031b9e6a5. 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/GBLFP2103685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc657b82f2bcbe22a4826e6375e35c60e76476777bfd0eb7e4dd42f598eba25c4. 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/GBLFP2098034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687a7594fae90c9afc02da94e64a6519758ce85dc6b550b56b42ead2c706a258. 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/GBMA22090433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c3d76061a7a57fe151df26aba5b6b0627755ddbfc6be37b1d83f48373aead. 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/QZES91947750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2135d9d504c06abb1c3d377570e584fcb9c7d9506235456cf407177c255e61d. 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/QZHN51925791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f907b0f008eb3bf7b5eb05e4b451c4f35fd7236481ed3f98f52c3da0ec5150. 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/QZHN51925789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2135d9d504c06abb1c3d377570e584fcb9c7d9506235456cf407177c255e61d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHN51925791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9fc025619607e84b96abc6f19a3338276bbda259e4368d944feac752ffa6d9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:12:28Z), 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/QZHN51925790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd228080a63f98a9aa218fe60293e6c3f4e8aee3d0ea57fccc923448a5abfa040. 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/QZHN51925792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd2f8eef42e6f6a063997b776220dfe60cff826c61ee985ac57df56b0e2cc5d. 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/FR59R1898082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe947a7e70e205f8cc43063ca62cb23586320b8cfff2ebc6f719baf7425a78bb1. 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/FRX201835002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccb15e2d75e5b57c691cdccb2b86c81ef58c1da0ac5a10da96b1dd6cbd59a66. 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/ES71G2334770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a0d35fb883640b2caf258b26e215a25aa1ed685ae8928451b1df69b98484a5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR96X1894119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57385ebe12124fd3ad28c82c1333d6d8580e0a12ea34ecb3d4797638c8acf986. 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/QM6P42511601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e22a0e2d94ca33808c565ad1985e050267a459314bc7c5c18108d3c011d1a09. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P42511692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef541ff0ac716aa1389391cb860b72bd2a18bc9963f92b9a8ef211970a7cc48. 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/QM6P42512173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0301cef3a4a2d0c2eee195fd84f75b63dee0879c5648aaf44545e50168a09bd. 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/QM6P42512208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756e9c43a955bea64646c3e8959fd6cc762c352bf202cd47b69dc879a1f5c256. 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/QM6P42512210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e22a0e2d94ca33808c565ad1985e050267a459314bc7c5c18108d3c011d1a09. 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/QM6P42511692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57385ebe12124fd3ad28c82c1333d6d8580e0a12ea34ecb3d4797638c8acf986. 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/QM6P42511601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b8690b1a965458e416344dc2d149073a1f43e2e7c4ebc8e2f1952fec5f0e8b. 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/GX3Q92332321.