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 0xd5d6329dcf51954620b07f7a32af5b688586ac0752cd1ed7c71ebf29a04dc31a. 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/c5df0626-ba88-4772-8564-cc34495de373.json and https://artists.proofprofile.net/proofs/artist/c5df0626-ba88-4772-8564-cc34495de373.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 0x9f0c5ddbf298b763ee33cc732a632757c1455b63194c0e3c7b19dc6883c21a92. 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/TCACM1603853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75eed34550633cc9bfb973c566051ae524496b34def7ac6aa5e1662c1432020. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCACP1639577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5775ad74185a068ebfe40d797986f782674e01adcd883b505e6b7069b2efb5da. 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/TCADF1706277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d3d590f9320afb7c7bb73cb7504cfbf9e59a933f021276cd773a2b9a33cc53. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCACM1603920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2bd78c23c45dfc9aa21a21bcd0d88b969ebda085448c7a7ced93d470b3ee36. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCACS1643584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5283474f3962e994fa34acd9c9c7066d01f141125afc3f8eb896658655af8cec. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:57:55Z), 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/TCADZ1828507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a7d6223729fbfd47a88c45cb9174906d18d261b39087e34205c800717af65e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:15Z), 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/TCADZ1828509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0532d23d4006a7e8dffaaff70377106b2642fbfce5c8bc3bb6306efae11e86c0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/SKC882000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45adca9f4bfda23be973ed304f0587032847abd477bf6bf585e822f7dc4c19e8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:07:10Z), 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/SKC882000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb180f8c95f36acc343edb9528e22e8f23deb288d268d15d4304fed8e445c220. 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/SKC882000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd643724e87a2e34f80a30ba23bcdd27e475ade76cc1974c13e05949501c2f9e1. 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/SKC882000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5113e1b3ed149b1ec589682a6d6735c92f253a96b0ae12f3e4b7233838b038aa. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:55Z), 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/SKC882000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa432f6f3b6f6388bef12bb5c20f9f3608f0d00d98d2c3e03f4f3e38ebd7f1eac. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/SKC882000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6fb3bfb15093129ee96348e2b7512023090be5d38db37219f7a26caaf252b7. 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/SKC882000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8944f1e84185a738266970b6de818dc57930c16fd3a4f27522dd7004ba59c4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SKC882300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930d4d35923036531663e1df37f1d834e9cd99532dc8105ba423ab0cc67d297f. 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/SKC882200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e4fc99b68dbe010d0dc130af7f89736d810a58ceded28aa4642c5928f2a749. 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/SKC882300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287dbbe41c4cbb1f4fa0d184ca86f722d99a655676471054142055605284d20. 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/SKC882300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b1fe67f255d9114abb78f4be26995639f0236d2fc10c19054b0ade32a52a3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SKC882300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62324513af120b2e205578070a5d7717def27c87c6ca93c93386cfed8935e017. 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/SKC882300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fedcf1649394eb21c72e12519f21ba34501384c3f57c32446884921e9cb2b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SKC882300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75a8e7c5ab61d9d76d893c79201f04ab0018fcfa0a2b094abf99b108143df8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SKC882300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f17d3477164fc9d171fe50a2e652c7898c185db982ec11efeacd5bacb30323. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SKC882300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2726dab44c18216ea54f5cc14e74bae3e88e1ff2c181249ce337076f6e2eb49d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SKC882300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c57ec05160d88e510004dd506d1dc2631f3135f008a5337334e78479ca2eff. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SKC882400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43dc06ce47659718c6bb36fbcaac87ab95be4f4237f699743273965a2705362. 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/DGA0T2426004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f9e9b3d3543d8a8897bacace44ba458c03258bde63206a37244b8e1a7a46e5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:42:07Z), 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/SKC882500106.