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 0xd4ebb840c13b31741f14ccbdb93a75894dc5f67b9b5ecea529dfcc19e0b9a0c2. 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/fb696f0e-9e8c-4ff2-a8a1-7c546ee133db.json and https://artists.proofprofile.net/proofs/artist/fb696f0e-9e8c-4ff2-a8a1-7c546ee133db.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 0x54d73b9ae26a445a25fdbf927bb5e3ce1642396e1750b7751b7d39a7786b4ccd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TLVEM2455564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3d1e45e17a4b2231bc634bcd6e0a6502463cfab14493671cc0c195dbeeab0c. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/TLVEM2455566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ccb547c2eee4379a7e49d8e3a91f25081d20c2e070230bae473f38ed7b9330. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TLVEM2455567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428a34e4747c77e637484ff641f09bdbee0b1bdfb246e45ef464b063822827c0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acad9442efc0c729cb5dfcef0b636b259d3ae3e140b52cc34c9729d0302d6ab. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fee1796c6bc9e4e55b7b067fa1d739e3a86b84a4a8470a6778301ab5b846940. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/TLVEM2455570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8a2f365194a613f64453caf623e82063e5ccd82007b53b32ed9ea2152f5419. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c2ab5e017c309444b911d987d3c397fb7ac23c0a2198db0560911029c798a1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5112b5875dc88b2fb473c6c46125586007a5b16ca2ebdd927d62678c3dbb0ddb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TLVEM2455573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17748f0ddee743e22896794c9af5e31ed295f703ed27a29c52b374d4ae071311. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb640c4d6c36ccb1bcc0562f371186e7631602348f1db68c88d46f97594ddb4dd. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TLVEM2455575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe030dc94e9d253159bd279240d401cd3ad9fea4eac949446594861f3fda2aa00. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f684fec1484ad90d5e56eb51fe876258f843b52eceb0025e4cc83466eb4b3b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/TLVEM2455577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4245f64e483e31bd7ac43fc0dd30ae59aab884137c8d01252f4f7275889384. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/TLVEM2455578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe607e22484b3665d9ea6e601c901b0a146ea7824698bf7200ddffe4212611e30. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6baeafd14f4a31f6359b3db975315001a9c052f09eee78f1db9047f9590aaf. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TLVEM2455580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a049922a01b6e7509d057cc3d2fa18a9399d509f39c9cec12a4aa5819e18902. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TLVEM2455581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd305551dbe9d1476b256e61d5b1a746844ddba4c02200f776e81b071e348426f. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/TLVEM2455582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbad4ec5d2ed4fdb13fc5f315a94d98690aef0f441c48b583a4d1eb511d6a90. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5076a2a687b0e617fa6c53c9ab0243d9d79a2be33aad65e330adf4154161ab2d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TLVEM2455584.