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 0x92f0f380c48fa6bd6faa29b8f55d4753ab45e9b9adda45875687b5615cdec283. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de9d9a1d-c830-4d93-9e1b-a02a2af6514f.json and https://artists.proofprofile.net/proofs/artist/de9d9a1d-c830-4d93-9e1b-a02a2af6514f.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 0xda0cd36383beca094f75039b01c2ecdc54f7472243a80f07b03cca60ef43e1e1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPVI01895980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb012374d6fade0435c8ec37853d6151c0b9d63de4e9037df3380fb723d69b6fa. 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/JPVI01895990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fecba0c1358b0f5ab5ab657a5423b8b626b5e7c38d1e42884705f8880ac0791. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/JPVI01895970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a9444be7105101493f2248a7cfe7c545efd6184cc70ad2bff88d620702901f. 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/JPVI01844310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c72f4dc4666e22b8d86f79bf7d7176779f6856295ebec1196dd0298283e9ea0. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/JPVI01811571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51541ba8e2893950557b115cd7ec10d630308545c6869dd3753eff1b77845ff. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPVI01896010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac28b6bae5d035f27721aa00364c958317cca525869354de5c3948aebb95d72. 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/JPVI01895950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd055c03ca6e3c60f55f74b5d10ad7f2d3e620724119182d8ab3254f1b0149b75. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPVI01896000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1d6c114f763e4510556c0991bb2c68a494897a6c188a80f8db4b09790e402b. 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/JPVI01895960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f9dfd14bd04399e75416a41ccb624e8f97ab7e28708b5467c6bf533361e76e. 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/JPVI01844320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9c0e6d6e2d6996c63c838c9795dee0a2c216518037ab3063c9ecba04fbfde5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPVI01810931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97acc12c8b0b0174f0873b62614621d803744bf08025aca6a0d95928d6d945f5. 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/JPVI01534390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a9444be7105101493f2248a7cfe7c545efd6184cc70ad2bff88d620702901f. 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/JPVI01844310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f9dfd14bd04399e75416a41ccb624e8f97ab7e28708b5467c6bf533361e76e. 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/JPVI01844320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97acc12c8b0b0174f0873b62614621d803744bf08025aca6a0d95928d6d945f5. 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/JPVI01534390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8256d6114dca92878fcf2924a2c18fb9f93c7754630d83ec68ad63c83ccb5e4. 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/JPVI01534400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf024491d7afad29a02411e195bada2055fba84768d3502bcfab75f82285b44a8. 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/JPVI01536260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76afe32a0dd8d1f21cf8459b428a423075235d30b93dd6e43321f6a1cf672574. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPVI01506390.