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 0x1e34b76f5a4849ebf3a5f551ba0c81bd002d67d6d971a2b20cc7cee652d60fbf. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/615ea0c3-018f-4fbe-aa4b-2129ce4f8c9f.json and https://artists.proofprofile.net/proofs/artist/615ea0c3-018f-4fbe-aa4b-2129ce4f8c9f.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 0x3cd75a9ea9c663fa6ac1ac80008b059801c61bf5d6ba5cdfaeaf7b5a84eb88a7. 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/QZNWX2519156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b427cdb69873eb2c7af6b73968703f87d851e13731922273e5fdd0dc810b5e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWX2519157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04685e45953c5a5351f3f1823f2f53569797f941e597ef18765e73dc832d0f88. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:56:48Z), 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/QZNWX2519158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46af3b2457886f0adc51e958afef7716f6eeecd01ae099f214b4a35a89372f9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWX2519159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79240858f6d24fbf98ea6831a7f5c1addbf6afa8571bdff45050f039e8dc6d93. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWX2519160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f18cbcc4529fd5dea009d1092a3993daa341160c0d074851e9b5df4271a49c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:47Z), 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/QZNWX2519161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2437083cef17c71b6e29818826c976c66dfc72794ab1dbcf824aba85ec3307e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWX2519162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319ee398ee99ea3101682d6d0d66749bdaac9a6d0817e42bb6244bb197426564. 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/QZNWX2519163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab5d2b53975e79a49a8c8e97fed1c0572f3a9a32465c709a63550e6398feb38. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWX2519164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a34d2d41b6050cb89edca8de0938138efbcc70efc6cd218a5e01b9a4c8ea8c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:06Z), 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/QZNWX2519165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eecedf69d4e12f6e87805f4b4683c20c0ba77c172b14166299ece79218ab0c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWX2519166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7d764835999a363e84811d4c734fc043849fd41b863d98341608dc8ca7f20. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWX2519167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb02abaf627dc190dc5283967bf8729d1f736d1c8c981795e89bb92d2e6d4f8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWX2519168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dde07e3a758eab4d0f6c2974770e3433a1e2952402b7ea13067e4f03c413aa4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:36Z), 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/QZNWX2519169.