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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a7bff1fde6e31340cbe8402ca71f204b3cf3a97f08a93a8463af8a0b8075bb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b257570-fccf-4a7b-ba1d-727f789d6ad7.json and https://artists.proofprofile.net/proofs/artist/7b257570-fccf-4a7b-ba1d-727f789d6ad7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aefa5d22d2bc88965185efae57026406cf4a03eece5ac6f7d6f372b1534b00. 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/DEGE51000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf27e18ecf20cb7c0c9a9adc5352aa7ca3a8322668b716ab2b6f095cb8ea3f0. 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/DEGE51000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc679e6557760c942ae81e3a5ae8a766284bda43d7969e51377c31666342d7da3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEGE51000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09829a91fe86b183be13469cbd22b46525694fb9d264634cb1a318f309ff17f2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEGE51000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7eb872b7e3e0f4a5956539a4ef9e0ba258d46580d36cd83f4ef18e743cb229. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEGE51000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb93e810ec927ff6d76b9e5c4f3ea0747704cb68e0b79c558f54538a1966dbe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEGE51000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7258dae78f4f5bdb75f7c1a772e6b6256b06cceb86c36db267065be2f683238. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEGE51000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d10ce6b01f86c535fd1789196561c5ca6c4ccfc1cb08014274afa432312512a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEQR41700995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3663402bc56089e3f15f909bdbfe928d09850e65db2d81709cff0c428a1f4c4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEQR41701002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3484e7556e03d503b5114629eb8c46981653f73f28a0f3084acb80180008b8d5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEQR41901255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d29000d1c69426a5bdc40aa98fdae542143454b905d5ac537790e18a11b382. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEQR41901253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec4a93a2aba1ba296c8c43efe92a15fb7fb8d3cbd1e959bb9dc196d7a49b2a8. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:02Z), 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/QM6MZ2457367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec4a93a2aba1ba296c8c43efe92a15fb7fb8d3cbd1e959bb9dc196d7a49b2a8. 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/QM6MZ2457367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba424c703b245ff4373f85a4b9711bb9532f029d6f70e1d7cdbd27a2dbd5858. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6N22429191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839845997a9613e80f27b68e859bc3f37bd0fc449b9fd2bc28f57239ef5d4d95. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM6P42429873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39990604d6d9a80179ba5d0ad58e3b79985f1096f44d2a4241e3316b83dcf299. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6P42429876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7489f11b8e38b7323983506007d55a17162e95dfba511b588667142d0f3d6816. 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/DEQR42001365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3484e7556e03d503b5114629eb8c46981653f73f28a0f3084acb80180008b8d5. 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/DEQR41901255.