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 0x072002f555a2908e1f1b2e3f56abb408234e29f078b8470d791d3a252de41436. 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/fd43f8ad-6e96-47fa-9b2a-6bc89200bc2b.json and https://artists.proofprofile.net/proofs/artist/fd43f8ad-6e96-47fa-9b2a-6bc89200bc2b.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 0x55715693c10be81b32fa67267a7499bbd56f13556be30cb0b82f7c9fbd578b14. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNJX2442880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb5f2390f2d70c7a404b5033cc019324d365e6f9959863ea36706e7c5c030e7. 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/QZZ8A2436792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7946cf4659ad304f3bf737a92efafde56cb9004b045161a715227ae2b253b24f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ8B2439010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd026766f108552009e04219b1ae7076ceb1dc8624f309f585a47ae1ebc08b782. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:20Z), 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/QZZEC2430796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbcf8180d9c0d988a317d28b875b0e2a0b6b3d1a5fe1078f9b82b9be36e9833. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBWUL2572328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a557be5d0173542ad974306d1b15843d07b5d877f429862cde7e7c5673e4799. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBWUL2572321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d649cbddc3fd901770430c534fd65ab629d6d1accaa5546f7cd811f6568217. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBWUL2572336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec4e2c73d8a70fc88481c3f1878ec83581073d2cd376abb05b4ed4dacc2c3d6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:49:04Z), 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/GBWUL2572313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a557be5d0173542ad974306d1b15843d07b5d877f429862cde7e7c5673e4799. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:36Z), 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/GBWUL2572321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbcf8180d9c0d988a317d28b875b0e2a0b6b3d1a5fe1078f9b82b9be36e9833. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:50Z), 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/GBWUL2572328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc612af972548b695f3d1764016d30b9fe6e5fa2144089cea06f80141ce87ed30. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBWUL2572332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4881f9c65d6d61fca6fdb765d74e1e196439226b80776c439818a5e2ec5e5183. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBWUL2572333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edaec26dd8e7b450b87c7b1e41c4fcb5d5efcca378fc0b75607a65b5f444b15. 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/GBRKQ2589740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3257844cf17d97b19ed409ee2fbeb978c90fae975bd0ed1bfbbe77ceefd71c11. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWV32538359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd50cbbb2064d632d54550bc6b71aa257f514e0fb132e184c8caffa56781d31. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZWV32538363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d31affa64721036ccc94e124a39b4a8daf003db8254b2cc7c4ce213982640. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWV32538373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816a441880ca32b46ee8bce7f3efe126bfb1d03a3b1d2fcef4583efd43df2e7d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZWV32538376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d917bbd48c4c689c2c44793eecd7d2a981c671b544dec13dcee26724cecb0c. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:27:00Z), 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/QZWV32538394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71f1954295d859c6d6aacbed072360e841861740e4d0532d8055b8368e07fb3. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:33Z), 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/QZWV32550287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5779ce595b67adac9abc3e514fd482ba3e11b9fc059b8a8e3f3f45227e72e615. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ8A2530952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6a42e20af7d106bde52385f210b3cb3da84802482b2543011735c48caeee5c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ8A2530957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea5b4985673b5b12c2865b3f329416f158bd87958e78fc6215aea4eb56af5fe. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:36:56Z), 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/QZZ8A2530965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34177e50707aa08cc7b559361e3d453201a89a78c4fc087ac41349761191e5a6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ8B2543018.