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 0x5b4b9799db4deb2b0af8d1865d90cc1e335903e892592d677614eb1f4b8580c5. 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/01ed65a4-018e-42f1-9950-9cafe078112e.json and https://artists.proofprofile.net/proofs/artist/01ed65a4-018e-42f1-9950-9cafe078112e.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 0xedc0a36931527d5063e62cf1658c9258cba93b922bd52623bf5ea0b2653a3a5e. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/ARYZ51050002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eb42be2face1654809c4a38630a5acd953bb60b25a3fedd35186f32ff46408. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ARYZ51050003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d827720fa528e6f14c080bc835c392d4637c9e0ac9aa7cdf7a3ce57bb8be57. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ARYZ51050005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd413437c1c48b0fbf31148406cb517ecd43eb3c7a08687a84bf7fe691f90c69f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USCGH1119873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6be2a3cf20e1f44856a5db96b23e6475516c1da6459983bbd313b6f82c1021a. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/USCGH1119875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63dde57e365d2f0f33f545f49d759f22305d07fbb14fdb173fb80ad934dc7b9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USCGH1119876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa168ddea5da414e6a6f5282766e125ec8513f4f390e9447aa35c2f29dbe104d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH1119879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f7c7fbbbdbc689cfa20bf8abe952896d671895335d0be6d0703f1c1e09ea09. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USCGH1119880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801fae7f84da0647c8ee17e4b9b2bd832f9b3ba1f049fc0b24c620069f7cb6f9. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USCGH1119881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f144ced20af3290076609ee5df6309f44a4c269889880176cc06ef0a2d50b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARYZ51320008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1e394e2edfe83eb7dc3c8d2f243b6eb3edf8ff6a22f44c0419613e5f69247b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARYZ51750001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69948903977e5d7a389a8b106854b2d0d877bed99884c45fd8de7880d8584573. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARYZ51750002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd22c540dceb2de7cea98a04c5dccd90baffa5324851584867e8af53c60c5982. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ARYZ51750003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a72f01984b0db19d6982e59d568fe8507caf6025049e5efeaeb05f4059f1b11. 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/ARYZ51750004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd4596c01995876350050eb92c1ea5076968f659961c270ecabf617956de423. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARYZ51750005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401323c40e8bf05a40c4158688cdd417c21c8b5953e93f51eb99b975cecfb99b. 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/ARYZ51750006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb97b0dc1ebf35d5dbc3f06096f3cc1261e3c5cd193d724534096ef5ed8a3b4c. 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/ARYZ51750007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22216ff607642a219ed1b72847043dd0b69a79e1e20fb061af11c34914db6f90. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ARYZ51750008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cebaf3e8fe00141e2a99d59002de03623d9dcb2ef2186c907fa2c84847939a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ARYZ51750009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21159808f2af1554e7a13df25c45984bc06a10fe7bbe20b02eb3989e8e8f19cb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ARYZ51750010.