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 0x7cb3171eb2ddafb2425617ebfad4e11ecfa0a32a10810f8dc008fea875df6f53. 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/192d0475-b760-42a9-8e4a-416325efe07f.json and https://artists.proofprofile.net/proofs/artist/192d0475-b760-42a9-8e4a-416325efe07f.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 0xc3272a088407a67f16116caa880d41534bae234f0e999aea9e1ba3a940ba4d30. 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/GX53U2313643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3c8d52f4d9d1d300dec40ad971b71b318efa6335ef59933dcacc4eb5a4b426. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX53U2313645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4bfb197af6948d69bdbea9a57ce6bb1950ee7c3c3429acf84a3d82c4f4d604. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/GX53U2313646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2212641e5b6a803d1258c5712adef098ae80b1acd57a61de1b85e8a2713316d0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2313647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca048ba14a0ea3a6b44c0f38b517b8a03c609013f9e61a5d766f47e92ab7022. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:28Z), 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/GX53U2313648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7731088360048c5651037b4d37106875f2a78675c416e41c5ff27a163fe75bf. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:38:57Z), 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/GX53U2313649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46141d0a977f082c2290f531d043747a0ce34824ebb4169632d19fcb85b1536f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GX53U2313650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40a051d74017a689b2dd26cdfa1d967d29df9cd0642821ea1020afd28ce9c49. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/GX53U2313651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b2d60bfca4183dd8ae72240c954e165781535db2d7b18c4c39329531a170f1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6P2568083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240eff8c124a50d65fc9a3fe5bd4d43830dee6311cb2c992a326617b9e55603b. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZK6P2568088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfd25cb29f7b3499dc42bc3c42e567bd8780fd87500e38b4e675c69c18978b8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:58:06Z), 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/QZK6P2568089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a80bf1793afd4811003ad94a838f8c237247fc7e56b7d41aec6004dd4fd8201. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:00Z), 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/QZK6P2568090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb229ef98c64c477ed1cd9a6868a62076e47830bdbc6f1710e31a41114fdcc2b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:38Z), 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/QZK6P2568091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a6c6bfb877bf1b1ff6dd6a2a7a2bfd4146d21f55b29b5ad6131948a2082c7c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6L2578878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5061a9a3f2cec0260fb54a969216d242da8b696654ae43ab17b1a01f9837088e. 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/QZK6L2578879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce58bbf8d102a9dda378df9de02b10ff2b06af52c9eb3206c6cbe92278dcebb. 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/QZK6L2578882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e17f1db03339383257b8300e03e3676c8de60bf1c44730bfc5662d4aeb67bc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6L2578885.