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 0x48ae107b11fb4ea1b2d97a37073862a796e444a613890b688b5d5eac1030ba0a. 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/cf7f1f12-708b-44ac-aa1d-7067e94800c3.json and https://artists.proofprofile.net/proofs/artist/cf7f1f12-708b-44ac-aa1d-7067e94800c3.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 0xd51629c34fe92a0c4e566fc7e7305c22a4ceaf2cb18e5a55a11348576029a188. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:56:48Z), 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/QZES62214452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d7a60c249881bdd51a5980e00b2a4cf19e36eca6c463596ba2456c1245eef7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ22317621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb051df6f2b105066e9a6a051201c2b047e23ff7dc6c2aeed2af019b7ccabb9. 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/QZES52376782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0dc104ffad3cf506f3867bc484a6516f494211ccb0b44c0ecb70164820c953. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZHNB2348248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9dab579b6773d29575799bfe1a143ad2c8ab364bc5aa1b35975fe2ca2b3287. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:33:55Z), 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/QZMEM2378161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3741376dbd10dc4896655d49cc031560f5ae0ae8b9bc0e68e5059ae9f0d4b727. 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/QZMEP2316276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fce3227064c82af9b9cf307f16fdcf052ee85769d09a4f68000da842c820e8f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:39Z), 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/QZNWX2378802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898dfa3b22a49be36917405c67751f15151609c96b3d56e4177d8f02701fd97a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:57Z), 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/QZWFH2312654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f8e972bba465df61f8e3b42ee8495571351aa89ac9cb7dac8474953744342b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:50:10Z), 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/QZWFP2392741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aaa2919b595de1ceedd41a50fcf88546e21ce2037d9b46370b3b4a4f9c1d5c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNA2415618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca0ca90db4539a204500b162e85f2eeb25671bc6b567e940f021b7a55a15639. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:28:02Z), 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/QZK6L2415672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d726986ab0f3675847508a26c42cc093e0f1d031a60fec69d062a5ebcf23d0. 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/QZHNB2493260.