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 0xd9fb3470d64c7a9ce3325b23af19049bf7f208f2271b701652f6b8f7f535a02b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/793be824-31ab-492b-ab5e-bafef353d0b2.json and https://artists.proofprofile.net/proofs/artist/793be824-31ab-492b-ab5e-bafef353d0b2.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 0x2545b24dfab0989fda518c59f4087f61461368ed428b6e37e16626646eeb633e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZMEN2131501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68120db596181f82ba2f4df5ecc848dde2f8a30488d60c6dd1662fe204da4440. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZMEN2131506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b0d6880b30b4e8120ed68510cc4a8171d199c435af34aba1a7b831de58392b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEN2131513.
O, Gud vors lands (the Icelandic National Anthem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185429571d266626498453d4aac9e3ba11712b02374d9ebe245e3a276f93e70a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEAEC9339030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b1eae22f74fe11ef7a6fd98d4470dc91bd94be80afd4e65b33f31264de7d26. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEAEC9339040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df5b2b060ab3d0657702bb3d866162e0e27cefd28e00155e1cad4cdcbeefd7e. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/SEAEC9339090.
Hun var thad allt (She was all you ever did Love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fae716091a614ca7c9f3ddba3572d5b85f4e855d5ce3120c741e4cef831686e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEAEC9339110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef92a08908fcfb361bdd350592e28ddcd571b479d6897927013afcc699acf4d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEAEC9339140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57cd5dc3ad7458295079e56f7badf2993add6493c48e1c6d9a0e098e2f0827f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ISIRU1000471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddca3f5eaac7012383defed87c4744eb421ffb6c5723753ef14bfd1eee72df6e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ISIRU1000472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd677fce208d466229f5f64b42d977a88356f10532443884a453dfc1236fe75b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ISIRU1000473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe60b67c391ccbcc321c2490abd2a3b41a2fdf7add8f0693a3c477637147d4d0. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ISIRU1000474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45581c74a2a9f46fc20658997a732ef4c4fc9ee9413d7d2ad65c0fc0ecff9102. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ISIRU1000476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7416bf6ff642eaa45c959a6d579067e1f9c1dcaa839b85b1554404322ccd6707. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ISIRU1000477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9ddb87f39f2a9954e93136f0cac056f8934836c005a89288bb905c0fc4709b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ISIRU1000484.