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 0xe9169d6c99eef5229cc95649ff44123973cf0d79f824da691c8bf2e092634fd2. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4bc2010-cead-479b-93e8-e47f20bb6498.json and https://artists.proofprofile.net/proofs/artist/f4bc2010-cead-479b-93e8-e47f20bb6498.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 0xa794ee5e1bfde41da0569796549a62106670a354555174748682c5a943c71cca. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/RUA941834301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a517d76184378af944677e867231f9ba74be10f4dbff3f0f52b63adc5c27464. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUA941834302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594c2bd3abc985ccb6daace6c4eed7a4d18156ca997f420bef53b3bf6af9466a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUA941834305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342db90e2326b3c3567b1aa1ac49be2a316d2dd8010fedf71e6cc2a858232b7b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:48Z), 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/RUA941834307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb856b83b00a25246cf00aa6ddc5a3c1b26dc4ad3c0768f428c897a50df662243. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/GBKQU1981918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c694767d6efcd39fa7dc3c98c301a2c20cdf63d06431426a38351cc04a686be. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBKQU1981920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999e0d9008cfa384908f9cd877fa3d4603758743b96153b1d8c5bd0b6616177e. 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/GBKQU1981922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7539b04448a7c196ee48575074cc4bdb981521377d1eb8ec8be281b59ff593e5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBKQU1981924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49f48d5909f5e6b7e2189f1fcfbc43860528ede9e5dc6eeca2fa02f9972204d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:33Z), 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/GBKQU2050937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d54d4a0a997bb1a8601507d4307376064298f82b606bf11bd688ebddbef6763. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU2050938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17be12cf5e6d6b1d4bfc281151147a315c05b11b0790b2bf7861689b11e158ac. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:52Z), 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/GBKQU2050939.