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 0x031aa4545127ac098c9a3dfcc32f1df7293bd3e1d5247a81096085af8e580449. 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/03676321-71e9-4496-8ec9-8d496ec44394.json and https://artists.proofprofile.net/proofs/artist/03676321-71e9-4496-8ec9-8d496ec44394.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 0x6e06a2256cbf22708408236792d4bc1e49b3485c8550dd82a668766789d68d79. 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/QZTAY2371732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416369cdbcd3ebc4307c6c38d93b761173318ecd8bc355a408c7a3eea559d23f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBA2421877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44a6abbb4b9f8cfa467b3449c65bc1c9d7e0999413cb81cbe5b4ceaa4549fc3. 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/QZPLR2203982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb36d2a543d7deaf669185161ea8d79d37b286b661417241d17a912cfb6d051. 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/QZPLR2203983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e16022db844f91f2d6a05406152c10a5a81e4d033d59525d69ba02ee9ad817. 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/QZPLR2203984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501b58161a70d2d3217a5d5dd6b1d56039c85c5225b8ae4bd12d06f80778542b. 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/QZPLR2203986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa92ff6e4ab0f04bbbfa0da2ac5210485ac3dba48d34b4cefaa8ec61a09da3b. 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/FIS202300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5612460018ac10b3d699f01eef7899756d95621d4d9fb3688a1ec104167c35. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIS202300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c7fecf684260a3af7efa1e844e8090f6f66feec89f7d4ba9832bc47eaf1dfc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIS202400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0868ae33ceb424ba86682a5f93cece1a30c386730cd0bfda5217b3b7dadf27. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FIS202400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b94eb5aa5a3b84f02c6e4e10068854829a6476e3b5c5878702a07e18d82eee3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTBE2309786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8096dab338c1f89a6203e8fb230f88ec867c87eaa8cf269cf5ef8165b15e308. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBE2309787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5bb6b81bbe2ef08fd3f619cc05280650e8ef2e4f73273a4e0cbf6057781f11. 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/QZHN72336835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f153376bd4b2eb073d26db37dec81d9bde210f47260e3b086aedfa03e7527c2. 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/QZTBE2309788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8885e47570c7b26d91fa0c68ae894c18f5c9fb80f87cf29fde152fc8bfc9690f. 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/QZTBE2309789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd9b811333f18b5d712ba33b56b8d7351cbdadd666f049bb6dc25a28146cdf0. 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/QZTBE2309790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fccc5bce25b2845579eb487a2fefceff73758a653e2f444974d50100060c07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTBE2309791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e06a2256cbf22708408236792d4bc1e49b3485c8550dd82a668766789d68d79. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTAY2371732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a2e344dcd87b39c2414bd4ac596e32eb94c466e6c62f18eee85ef5e35ff935. 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/QZTBE2309792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2085f0fa55884217b8d0934fb78c5adf078c858e7a5f8bd72a253a73887cec2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNWT2224413.
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