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 0x887ee67fbf1cff95c5632b4fc04ad46a11e3371ea9c9c136dd8b6a2f786c7d91. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2aa0b948-c3e2-4e12-949b-a1d3a4610485.json and https://artists.proofprofile.net/proofs/artist/2aa0b948-c3e2-4e12-949b-a1d3a4610485.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 0xaa1dda6801e17e0718c2e9a9b7ba149fcf19a33d28f7dc4f8de99b3fc443140e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZ93L2129082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889fd4ea4083dee67056ca10596a2138433c24e96d901b43a794ef0aabc1782c. 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/QM6P42223138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e2f5d674f8e381ebe3e0ceff11c4c0261438bdc0daa874934ea7a2ff73bdcf. 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/QM6N22258972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a1006cb2820bf5945ab68db15c3ecf9943cb2c2435be481e729ae0c5c62744. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZ93L2136916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aec6077dfb10fdb758712c3f2b415a6c0ead4e836baaea17c0cd3136b6ddff8. 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/QM4TW2376944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57bd132dc6ca6141154348d27cdeb4cfcf29410a158602ca98314b8a36188da. 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/QM7282372389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733e2a87a0b520604c4fe2de054e2250fc5f8cc552fb660242a8cd6799a0e68a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QMDA62305159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b6032013cd010f04b57eab7840e7ce3c6c25d18b7171329128b8a73a5e220a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMFME2362206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25455aa4deb84a6813d7b7919b79e3f2f4148bbdc074af03e9d6589003f1b56b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QMFME2369069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b6032013cd010f04b57eab7840e7ce3c6c25d18b7171329128b8a73a5e220a. 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/QMFME2362206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73162e85def6f2a59bcfa672a08cd3b0d594e9ddddb86679396cf2b086c2ceb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM6N22328686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72ba9aab3fdb871f7c8787de1fe59beb75f2711e2d17636db9cc7bb1c5249d1. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:32:11Z), 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/QMDA72494696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d0fce0001ccbb2c759af9a86b44170f8065b017f5f9b50d97947af97aa37b4. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QMFME2462654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85ba2877390fa76c851291498dd91bef96d07a55e5492cf759621c86802c0b. 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/NL8RL2522292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c193452b892adb8ed5350003d32fb67b0faf0b325a8a578671260065fe690. 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/NL8RL2522291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac22f1487dcc2048ef7e064142dba5f1974b56abbf9375a8f1e08d238a90b2c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL8RL2522290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80122fa4981750f32a395afe59854ff8f3ca31bba26a306f947ad047e1bea0ae. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NL8RL2522289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964ed262f6d99b7680a143034776ca345fa6e7f6efba5a747a6472e30e21b163. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:56Z), 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/NL8RL2522288.