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 0xd03b3f02f53a6743fc46a470e0387774b3bb3f0e25d0d92e762b2d04687093e3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b1d156b-c0d0-44fa-ae69-4317b6afb852.json and https://artists.proofprofile.net/proofs/artist/8b1d156b-c0d0-44fa-ae69-4317b6afb852.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 0xf6ad2230d3205e800c69a21cc8854f1f6fc68bf0418873d00ce500c94f6ce31c. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/CAYU01500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87ae8f19647db8b463580f1545f6f3d7f9bd6d39982fbca0cf82065a4876934. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAYU01500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ca81d7bbae8547f457724b7587a79c3ff842397465b8241dd984871d5b2c7b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:11:07Z), 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/CAYU01600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80da8368c57eeea07e29170c6d43ac79085772d08fed45cd8caab53ad315ca3e. 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/CAYU01500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af57c4c2467b73a27c81f3701c522dc9b290c02ceb997a07b821af471f79f58. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:43:00Z), 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/CAYU01500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ad2230d3205e800c69a21cc8854f1f6fc68bf0418873d00ce500c94f6ce31c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:44Z), 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/CAYU01500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8d1e18ea652e40eb9671ec92147c044ebd1d70cd617e03f42b153d0ec78ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:43Z), 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/CAYU01600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80da8368c57eeea07e29170c6d43ac79085772d08fed45cd8caab53ad315ca3e. 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/CAYU01500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea7da7e0e667185573ebbfe940285f1a0bca46d1143d85844f53574691163e4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:26:40Z), 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/CALBZ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95812ada28da1e7d744d69f98bbe409843260ca694c4dd555c4b4be68bb4932. 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/CALBZ2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837f1ead9d5bd05a61761bf523f6172a15141ed80f84e78b10c1ed699ba9ee8e. 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/CALBZ2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657421e90ca2ce7687c4868af593de82f659998cea53b8451de99ffe216f03a6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CALZP2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a339959df222f7ef25b4991f491c28a86958eda231174aa8d58fbc91776c43. 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/CALZP2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54483041ef9c7747f7ded022c9f03395a519bc11d01999588bc06639681b5b0d. 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/CALZP2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ed10ab5dc4fa7355d103309e62728c327295e1788bdd40df4c1d8a551089bc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CALZP2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657421e90ca2ce7687c4868af593de82f659998cea53b8451de99ffe216f03a6. 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/CALZP2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd3df681fd313fb522804abaf4c8baa69a8ce8787996afe528dc68fc0a4bd1b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CALZP2400003.