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 0xc0b3651c5b2f288e0d8a8d3ea5b488c118969f2eabe6960610c5d91d0a823899. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b2d6dfa-1da7-4973-9b87-777c3b55ee74.json and https://artists.proofprofile.net/proofs/artist/1b2d6dfa-1da7-4973-9b87-777c3b55ee74.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 0xb1e9f05690f47d990082b4da776bb17d51d4459391dc6680166b97ec643f66df. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA561026246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a5981f26f6430d9fb70a9a652ce2f12973ae551b88418d8d91998a8e7e8ded. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USA561026247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd22495b1dd019797a26c9124f14b3b9859d0b05b6c0869564bd9622c83c369c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA561026249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2c59421add586de93a24a0bcce1e7ba7775fdb57414dd8420ceba5d296c78c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA561026250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c36fc8d2e00054d231a71ad9883ebcc884fdcb4e6f93c4d066d46042b8ba3c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA561026251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c9f70d92540813ff669bb940ba384b72bef6ea60bd6b52f153567c4b21436. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA561026252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27f35213c98b9e0767c98a596831211a93a819e32e50b266207f41f1114dab. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA561026253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5468317f4980af163313609fd7cd4179dee6055df168391814ba95276712711. 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/USA561026254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5284c69e97ab22f59c44e3fc05ce0d6371b91e95c8bf69f3ad56aa17f9b20db3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA561026255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7df6e9298d2e5f5185aaedd2e4e63fa55537bee064d84a1a4b46669e2fb14ee. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USA561026256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259ac5c0f9c335da9e8865cf1da20a28c7ca2f85e8c6d15e6ca99ca7011056e7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA561026257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23246b0c1e35c8f9cf1c36f798ac0d7008d350a92e67427b93954b6bf6af2ba. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USA561026258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e42da76ddc89486e01881949ecc924eba8d0fed5d040fb470bbe026dbdc58. 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/MX4971401912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21fa67351838160625a517c789e2d96fb75e9eda6ac6dd8466ab96464bc8d88. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/MX4971401916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34060588f1a6145ada1904bd0fd941b7fc810ce5bce0757048f588b1513927ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6MZ1431606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5df68c1a8ea0ff423b2dd8202a83e423b8731e8705abcca9cb2b37de8db6979. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QM6MZ1431607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a9cb80626868173e3b3958ace9f857328639a977b77757b7c0b0eaae9b0a7a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:54:05Z), 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/QM6MZ1431611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da5f847d42256e6be3b65942f296c5628971541833aa6e0452a4e34fca7938. 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/QM6MZ1431613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40019a18a8c655173c9ed3aea9ca5aafa2d58e6d64a99072d4c803b40e861ef5. 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/QM6MZ1431614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861dee25e1b8c616f60590e0a13f7a4933a3f02471cd8082dfe4f7e0e0b3529b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6MZ1431616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a4602ec348531f8d5b99f3bafc4e117b04a175d2a04e6c22e67222c00dfa0b. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QM6MZ1431618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5a09f4b17f9333c85dc6f45b3e70e9ef4671e475f50ea3f14949f6d81de1b0. 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/QM6MZ1431619.