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 0xfc405b6cdfa990ab3f6831636a1f985c5dba12a9571f15fc0b16bb7bfb827d96. 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/86dab558-bb9e-466b-b280-105dbec57109.json and https://artists.proofprofile.net/proofs/artist/86dab558-bb9e-466b-b280-105dbec57109.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 0xae0f07a3c87c681858952eabeffbb2d70ef4662a5afe3a798a651a2e7e6aa173. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWY2326732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6ad89f6b6bdf7befb399ed8b9af05f1d2e4f5a66fa23e587b4e1dac73c46f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWR2254352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c29e97d4ff0a84a7c11cf3883b9c689677075acc57cddefb0524cf2ef23d5ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEP2245275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5d6990ca063374426a50b6c64770aa8a8c6c64357611e62188b9be456f12e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN62228338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8266962409330c0974ee49aa2f04bf433d5649abb724cc35ef3453b1971dcd5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWZ2150372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab597d141fda3fb637afef53f44e006ebecea671e37f868baadc74c04a494237. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6Q2113527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b126864e94d8b58df21d7a818bfb894e6fcd0d6f48db02b3e674d981bdfa8d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHNB2124871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94541059f63f0425285ebd65ded738693f3d56413bcfd1bf6fc79981ecc071b6. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZNWS2482420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe843b311c351c039bcfd452114c5856e44bb415a89cf08fd03c9e1f7db5ccc19. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWS2485158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd02ed3fd25b57beae93521da28a6d2736165d3b4414eac0637bf0cd07ea9a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6K2484055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5ae8b331699c0fd6ad8467a179592c0abdf5b2af2ca9be9f98857cf23aab2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTBB2361406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04478dcadaa0beaed527e5014a35a459c8b4a6337fac975690c92a07a4c1797e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWU2091000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d0cb81cc3000cdfa49a3b9beeaa6d442e9a58af8c0b97a94f5611a373a625e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWS2094526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b885d4509b8721aec593a02a7a5a363cc6ad3588206445803b22f8a0f305a1f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLR2240596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317ff8e3135284c2c297dff4519a0d9b204bca1c1c4e8eebf64ec7de55fee1bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBC2304816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08c00e4b1ee266ef8198d95f88f7b21ff258872571d74def0567ae743c6b090. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAS2293228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f915a0a1443208a679b0c766b7ed1b89c4d21e6b609d0b2a89c4a712bb6fc1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ72345918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bbb70d31cd074caf64882122f14dcde2d36fde012a865aa508d0f80540eb22. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ22327570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e5eb737f660b91f19ed058dff9a27f57624147dbe678a7f9746317406ee3af. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6F2445921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a4a30ab3c8bec100991e9eb145d492c37c59be1813a236f8ceb12f6814e6ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6F2445923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da944c8994d9bd9e862f5d2a18f3d415de1b401a9cd9e45145de15a60591442. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6F2445925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cb300d5492189cd627703be13d54dc4a5af4be8120fbfef2e245778a4578c1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ42450271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a07202f8942e91f0e67c368d8930706c03f6fc0da08f045127e03d669c542f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFJ2335759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc59ba969a412303552d80ef03ae1122069cbee62db6e78cbf64e4df2e6a6cf3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFE2324751.