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 0x07cc5390701fc77b84eeaa4ce69820c0b49e0c78cf0cb8f56562f9a701cd7d2b. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38e075c7-c395-4b90-a1cd-182b54c5bce6.json and https://artists.proofprofile.net/proofs/artist/38e075c7-c395-4b90-a1cd-182b54c5bce6.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 0xccd2d3ffe5dcd3c40d31539f1e379f02783763c7f5c4689a45d121c94a4909bd. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GBWUL2558593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcd53a1c5a7473a63a651bdf8d07368a562b79c714b8a407fe48690a08d6ec0. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBWUL2556046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34d03a796396be16c3e11bdc3fb62747e2ee9fd220d114f523908947d2232e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBWUL2556084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7086d324e092f8ddc42288c8543f94229acf05244387f724061121a6467d3a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTRX2527779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792cd1eed1ca8a24aeee5094ba45cfc4131013158630942d8631ffbb2499b989. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZTRX2527781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec9e6983d96e66701763c7d982e32cddca70d633baeb85a6065ee0fe570473a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTRX2527783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aad5dfe4f823ec7fea7e429d685b00b156c2fa9ab86d6c4cd43166f42c8a318. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTRX2527784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdf943f4714d46ac32a38f55070e59a60e34494600b321e115e88c775157f55. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTRX2527803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610c6de074d696896b231979b1c2e2ec996bd064e60db50a2810fb10105fe09f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTRX2527808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c398ab2fb614901a0303a98be862c1434d641ad71630dd976d0d84a2852828a. 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/QZTRX2527810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e69a666dfe56b25d1d15b4930bd727aac34a26df1897cdc51346bf7f2a4c06a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTRX2527813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd5da50516de72940863d28eb6b75ff4a9ebb61e3e02e67e2ce062539013f1b. 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/QZTRX2527817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8949472f918ac632ddcbcd5b49c072078ec047cd04acaec7e44847fc2a3e4b83. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTRX2527820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173396075c3a39fbd07e8d2123419bf28b0170fd91773ef3d28c5703180e50c3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTRX2527912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cd02d630ffbe8c500e83542bdf9ef72df7dcea73be96d092e284d3cb5866df. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZTV32573159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49bdb2d7f1355d7b8570de7a4c35822b3bc42a9650ae43df474323e8522a4a6. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTV32573161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53f5dcee591fd6e0b7806b42c09f28ef0476c414f02c138f4b3609ddc66dde. 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/QZTV32573168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb250c797e30612c534bb41c3a01657355adf6c1ae9583dd9f4e23fbadeb0a523. 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/QZTV32573173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5723f0da8513b656d749b79cfb780bbd058b6654af40cf6e0a94d43640f7e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTV32573179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb580efff0fe48a22a454056fb16ae978ceaf419c4125579f37c77a7ccc1407. 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/QZTV32573185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd832dfea6b004c1bad801a36321e179cd0dfe42ab07364456f20527392c318b6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTV32573190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0eadd72b877f1f3b2496bacbcdadb419f052b25c2c092976b99ffb01b550d68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTV32573194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f1bca48bf8b29ee6b8951100f324ac686394ee484ef13d27c55515c6e676f4. 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/QZTV32573199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bbab5bb28d8a7df3727be00b1769d9decad1e916388b674aba2a7b65dc8ece. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTV32573204.