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 0x204396bd6ef41277be19d69f3daa6a42b9405d294b434698c99efa196c96d343. 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/70eec6e4-f605-458c-9f09-e580faec8663.json and https://artists.proofprofile.net/proofs/artist/70eec6e4-f605-458c-9f09-e580faec8663.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 0xa82c3fe43bcdc4410512b09355d1238cd37ecc92227d0bf09615e5ceafd94fa4. 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/SMRUS0058686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da849312c0eefc6923ad79beb73caa396260cbae079b5cfe3a6688ee4ee3bad. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/SMRUS0058683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82c3fe43bcdc4410512b09355d1238cd37ecc92227d0bf09615e5ceafd94fa4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SMRUS0058686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b86e601691230cb4d24e2a2c91fe6e352fa9cbc220df568b7f36ad7aa590329. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR10S2006170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b86e601691230cb4d24e2a2c91fe6e352fa9cbc220df568b7f36ad7aa590329. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR10S2006170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598a425a70cdcf76bd272c618dff886b5de25e9cc7ea1f94c3197599ac09761b. 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/FRX282005863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a30054c01151c0abbbb9d203ad20c05485b0a8fc1b62052c493be29829518f7. 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/FRX762075878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15113518647303afe6dd5e299e7d3020f1849e030a0ca9ade75cf08a6d211719. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRS182091385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98be1f3d770ed4426cf09e18c36b5b83154406e306c9a1d1912e050a6bcfb3ba. 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/FR10S2190923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce79b00e70ff1eb439680437ea85d42d56240a53c40c0b16948a3db368f106d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR96X2185128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce79b00e70ff1eb439680437ea85d42d56240a53c40c0b16948a3db368f106d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR96X2185128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0051238cbf49398e6371cccb2a06c83727db89b2f8a9dd58b2a1c9f572f5716c. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/FRX452118141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2039522b7508cd43de102f5164c2e248785c3d6682a2d4c05426cb5a345dfae0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX762137133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a362ef2d7b23e11fbfbc460798e8cd35ce7d0b7efd1c4f707bcc300b07ab164. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/DGA0D2154819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b103cd99833ce5cd296ea73d43a1d1b2fd814d927f76ad79b9441584875a60. 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/FR2X42234527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa875db83bfe3a687282fef518aa779c6bc7b52e0abdeb5324ecca5792687ba62. 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/FRX452244687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235e7ded8bed2c7c374b1f35506ff65b0635f526a96ccb949694535511029d49. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR2X42338452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bac419f1f13710eb607cc44d381d5e267dc3c25a7944bed7b979eb0fd17b219. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR96X2325638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5145a80812d4a5aab99924db10fe9231df8d856a4efe123d619b49bc3fc19f3. 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/DGA052337831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a6e6aa34b5e4740acdb6babb62ecae933bc8e7cc179bc46758ceb6d225180b. 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/FRX282463662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb273f25fa445411bf11bf237f456ba4507271e91093bcb03bc839bfd6953f98. 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/FRX282463665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174b2feb21d018d89cba7e766b65acc6478a08916abc8244639f7fcce5d37e38. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX282463680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e5a7ebf58eb50b931d1c7312a8905318522f95cbbb49066063c478f15f4f89. 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/FRX282463683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2a185e38a783615ccbcdb7c56c1ae8e9e8ee0c22182dc2cf27a8bd125fba2f. 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/FRX282463685.