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 0x6c0ed49950a28f47eb416f65a14830f7bc71797c4b92c004c07abf5e3f66cc5b. 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/717bded2-4f1e-40db-89e3-dceab3a0ed46.json and https://artists.proofprofile.net/proofs/artist/717bded2-4f1e-40db-89e3-dceab3a0ed46.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 0x2881d96307711f98d447ceb1136adc6262681da172d1bd6d9d79c4006550fde6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBLFP1535203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6127669a8610b45d0b0d9dd8a0b88ad5ce4a582e87503f7d7bba03e27a1fc267. 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/GBLFP1535204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ff4f574f6b0cbe80f9290286ca2d853bec58eb1156160d7eccb3d891dc52b4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBMA21826134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f347866ee6e8250212eaeec53959221d37613e2d5410fbf35953f9a4e9d2d85. 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/UKRCF1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b1208544a601400beec350a6a56d472368496b3cd41672f1281185ca312514. 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/QZ93L1806214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a69a2490e616660d1616daf2b4f060cd91b7a0e530f9f21887915be1f452ce. 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/GBMA21972042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2cacb8b7e7444bee0ee10d51654203c06f38ec1d0fccdef0490873b2cc553d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZZOPM2003215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2bbf874f34601ba74395c1ece68d61667ee06c620030a082bafc059d2d26f7. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/ZZOPM2226001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e7bb3a810e5243746f8698b7224b22f8f882efd21942e287244b1c30472a3b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QMDA62264459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb06ff4ee90b078469a83fde739d8b9cccab75c453dedfc3e28b16f8de6f3c9. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QMDA62264461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf655269ead43d7dfc2ed4d180605fb546a580ffdf0facf832b847b129a9e9b6. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QMDA62264468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6962d7e8b85ff2e3601f838b32d4c26cf84d492b604ae410b1d74d352d8eb7. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GX3Q92445615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f785b037b1cff3c81689097e9f5bf59b74678a44b7b8b94ff64bfe103ec184. 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/GX3Q92459081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a2d71acfb31b9c8e48495a11f1c1f1a6a7bdff5f61c6685378e3774dec085d. 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/GX3Q92453741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd570fd8648107c39e841edef26765814ce325e82fc6d578e44181bdb692e96. 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/UKXN22493403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971f92bb928de0a7e4887b8c46d063f1dc1a5a9796e01803ac3d0c38d48480e8. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/GBMA22473101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f785b037b1cff3c81689097e9f5bf59b74678a44b7b8b94ff64bfe103ec184. 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/GX3Q92459081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ab5a283cf2b8ac8cf0b8369e5c530370a869db99433e1b11fc8cabb7cdb5ac. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UKXN22451794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8c454882711fe171762c2a800ce145e8274dd181572f9d67a765dd19b63a3e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLFP1533691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f329e13b48758b99b4974ff15d98ded1804c2bc13c761205e78b0116cb7f54d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBY711530154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa237dcd51db6613977d99ae5b8e5445a1b19e27eb18d8b692516027113d7fe9. 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/QZPLR2341259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1da8e85870bb1811bab2bbb7086ee4d9679eff8d2ee6c10c4aee64458dd78e. 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/GX3Q92323642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca88ea5582618175707e507361dd586313f4aebb41cd63685a7222de9949651d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAGC2248884.