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 0xfa2f315c89bc400f7fa7f8dd6e215abcc93c0732d8c3492e03ad8d472945ef57. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8be80848-f4e9-4e90-83d2-61aab500e9ce.json and https://artists.proofprofile.net/proofs/artist/8be80848-f4e9-4e90-83d2-61aab500e9ce.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 0xfd0c835b3db88cb1a266c20c000f0385c681521f737e39da9b7ef5cef932f5d5. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZK6G2027271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71219cbe65dd70d6a1d21221a58c3c2b3f198d3c3d1c4c433ae65e4cdc9442c. 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/QZPLS2181385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc4b04c99fdf9c99692bc97414f4762bc61f6807849ed61595ead95853aee87. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHN62262883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae0b4c31ec33c9e8dc456f33e1af95c4cfc06fef612633504dbe5c10581737d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZMEP2134982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9af920fa2aea9f6ed80bd9f85b03cd8bd6ee95d766e2927568ef04c3e8b694. 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/QZK6L2265592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243b987be88307d83132ec0203bc6995184326eebf0deaa16c77fd372a86631c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZK6L2265593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61154233d959c66f65622c48b35fd200a7f2ea2aba9af07129c24fd70e7ff43. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZK6L2265594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61ea2bc54d202e87c51c98b568254f84188ae74ee132a837278bee029dfd95e. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZK6L2265595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eee9dee03391a57c93143da4bc1a6727627dce5aebe972e55089cef92e8621. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZES62315988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eee9dee03391a57c93143da4bc1a6727627dce5aebe972e55089cef92e8621. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZES62315988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e13042c97b10664270c917a381217ac9e6226b2cec41b27bd45c00ef1897ff. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTB72389744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8800c5472791e2cc4fc4302059f74af9a4e9eb4003d8c4676e3a26e24a1c4884. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTB72389747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae9deb9914e723ff167da294ba224a9d8a24e7fa0fb5db91be56568fce9bc09. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZTB72389748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d080e89eec9bf1928478b7d3243ec176f6df5af36a65ae163d3164872766389. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTB72389749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285699928ccc527559526f403b6b1f0b68d26b2ec423e236d573da0af4be383e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN72597035.
Draw the Curtains, It's Too Pretty Outside