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 0x1a1e3a2734ae537c7da4d3bc35801388956fa85ef001b2e36e5e6312623a668a. 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/bf2a68a4-e29c-4cf1-bd7b-02290d5d51ee.json and https://artists.proofprofile.net/proofs/artist/bf2a68a4-e29c-4cf1-bd7b-02290d5d51ee.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 0x33f6da6c66a862b80f5170a63fb2fd90de47c160e19c0144db4a0d5b67bdb474. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM24S1834403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bf3b14cafdbdc2ea9ae96a5f8b9a5e0847e216c5e3328d1be149dfad427373. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM24S1834406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc28e79fbea5a3a55b707cdb2d08aaabf26ad078ed6a7fb6a00c34bb8dce194. 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/QM24S1834407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054de17f797997557e477f11c685927db9da72ad0b780f6aeadab979ec034487. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM42K1817331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c87d166e13d36e0f73294d917d8ae51bd7327bd4651777cdc47917065fba41. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QM24S1907999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d6ccc38d8ea47136fe19046c076705a8a086342aa298b6effed7da77d69359. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:22Z), 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/FR9Z62000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dacb9834a289a57885163448d40d14c61aed7dad787cf6e741169e04ded02f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NL1LE2000478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f31a9e98d8d697304aff301ad2029c1dc035c035124a43abe4a1a9a24ac19d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NL1LE2000956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8804f81c4ad4140425a4df121a1d0a678ba4a8314dbc702607c1405a438ef9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NL1LE2000954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024a7e00cc97505f30e3b77a5ec109e76922239c809b7b343ef5cf406d705067. 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/NL1LE2000955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3713959d14dc02dc51122adc3e4f7dc9f54328b965e5d7ea50aaf13873623c. 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/QZMHL2089850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7f1c69c6533b3af694d51743525ad739977ae485cf6840d332cbf547529f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2204000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235421d81326a3a7f3128c776dd07cc6891def0411c08e1aaa88b092f51eeac2. 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/QMANG2214544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e5946000bee23b8506fa7186cc70c224f7b7820d76f1d0cfa0a03234125be7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2428717.