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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a3d9b284d0ee2a3e0dcdda51190c5eb534d699f88ab54fcc6dc2fe99c84115. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ccb8131-844f-4dcd-989a-4fb40549e4c3.json and https://artists.proofprofile.net/proofs/artist/3ccb8131-844f-4dcd-989a-4fb40549e4c3.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd1ef3c12f851ba5dcde94b904aeebfdc1dec571154eb39ce2498af2352d7ec. 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/GB8KE2408260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fa83f570e8a48a8ea3f599fc9dd8376a59fb61e99a782804e47fc136eafa96. 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/GB8KE2408261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa8b181e9fb12e85325068c7cbab828c7265b04214739d38340e27cb87b0ada. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB8KE2408276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad1a78a06658c9343e3e2ca3270577d12e1fb17c8ea2b4fe48f2607b715ec47. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB8KE2163350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b25e46ad25e51f84b9a25ae7f53d5e1fcf07a93afcc3995e747bd147622873. 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/NLCK41014709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94d5adc417f9c9fd645336f152f0c18d9f62f6bb6c3aaf4253120b40491f662. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLCK41014712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f2b67df13811d1cd74ee938b08657d66f089efb9946d41764e73dfa1b246e6. 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/GBBSP2410013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5728c70a761766a7a9b558327ec795f87e08a3a61907df39959c74052a432b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLCK42406159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b586603c2841d753b1d5b7f0bd8b838d6490fe1ebbcfdcd89ae3658b7735a95. 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/GBKQU2417308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f58b3a8ca5533711ee8a912280091c64b4e74baad74a4a32eb89eed32a27d69. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NLCK41049094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1891ac88e2210be45ba32bcc7ccc1bbf07df77a8a541e48c1827e0a33e9cd48e. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/GB8KE2402643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f55b10a487150e44dec857dab01399fbc95e8f2b5554acc7fb7494d6175ea0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZZ8B2348874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3f8f4eeb8d2e1268c757fdde94d58f1b2c8b2daf2b83e882af0b886bb8a078. 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/GB8KE2326270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce52a092fb1a4e3cca196d4bf4cc11525851ef2c5f00cfbf4a3a22b50195941a. 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/GB8KE2326271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379f4e4bc3094ca2df0e2b6cecc1c902d857bbdac297b750df714d1ca0a3aec5. 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/GB8KE2324446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c1943b51d4b015d48d9ec19fdc7d92f52a78a22ee24c75df859029dee36d76. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBBSP2310019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b12a6547ad07a6b6f4537bff9d629bdd4489ccb453ffa7563715872412e19e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLCK42233179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837ec1d829a50f7443404aa5b39481157482ec91926f2cb4b5f61442ddca9d5. 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/USLZJ2339163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b0039a50ae18e2fc8f9c4c5c407f5a4de1b7ed4acff970d356be7a189206b4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWDE2259614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429d13ed08003b8b7f94f03a13a835026aa0929ed3db70a9434e54296ecb3b91. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBBSP2310004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18f93afed0ad1f9dba2ce4df3acc1d63cfae67969cd620f71f7e38faec64325. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLCK42225088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb3ecdb7b39f0ab4ecbc51a2e05202c1a61f0360b9960dec72f117c5908d41. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/NLCK42225089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6dd70d562d5feb4116c0d76a06a2aa00b73fc0bdce5e1257ab999ad757abcf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLCK42225090.