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 0x5e2ca5a1e14ab34f2db331f589199697f037efe9aaf2760c9b10bd907893cc9c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6dfbc6c-e7c0-456e-bc4a-3a4e4d9fd36a.json and https://artists.proofprofile.net/proofs/artist/b6dfbc6c-e7c0-456e-bc4a-3a4e4d9fd36a.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 0x04a82cc9a138833d5d4732ff6e936a9469960fcd137784d05e25d595e8bbd853. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHNA2495550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7c1a7b517a02e6eb54c414d4f8cdc1e0507952050da8bc7ffa31ebb6a735ae. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHNB2449188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a6373f88e481e723212221fdeb21774b7d6e57e5b87b07f7559551f704fe8d. 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/QZFYZ2517860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cb537efe2f0681e9a7f03c2f2a0439e11fc52056009c870969f2ba60e2f5c0. 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/QZFZ32555702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092f10e494ba3a9a33add727f6f6b99e3d9df874a46730844475354d821a47f4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZDA52584362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd239c8de287b7dcd86fb4607f489944feb16eb6144dd1ac882673b864a9c45. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA72579676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f01898f3eced91f0cc23950d95e0f073ae2ba2dc9c2cbedb5f2c7f66b82468. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN32536405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544fd146df5c35fb349d67d5672ee5ca4d27897a5b7660b471f3d1dde6889f8a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:59Z), 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/QZHNC2573477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089597e71ae451d2ca8c2101ddbf112dbb641a8712b3762019f91f8bf935404c. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZZ7L2504517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed187ba35f01db6bb4cf46938583cd9716e264ea52e594a440a51de3254efa2. 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/QZZ7S2541673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5e6c6aaa7fc0116dce45a399fde976f41d44e963e4237fc90ea53482db872d. 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/QZZ7U2535657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d8f4dd991a96aa90ea54a50de040dca5e8d4e42a586e3214c697dba6a7a0c2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3EZ2542696.