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 0x0c583fed770ead9610e1f0931c68f8b86ba8c87508b68cd057805de8abe256be. 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/39e18324-f6be-4f3c-a3e9-6c64bfe03720.json and https://artists.proofprofile.net/proofs/artist/39e18324-f6be-4f3c-a3e9-6c64bfe03720.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 0x5d4f17d0156c1359158992eb63372af7e24dd45dcb16e2953b3a83e59d28cdd4. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/FRX201994588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9875a715912436464da80bcfe010b70dd22d0b78220bff23f4f998680b4aa6d5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRX281908184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bb290f17a7c21a2e3e03bc4c52bebdb538da099c25b4709deb36f9c26a7c33. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX452030046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059f3612632a28f1c387d0c91bc1f2058004bf0e86f6622b94534dc183cd65cd. 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/FRX452026385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e16250350f4f7626a969cae932566de13ede0d4c3212fb3224cae584607d1f1. 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/FRX452026387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda380ec931e3083bffaad784a4f9c0209647fdcc4458a6eab4f3f38cf67d77b3. 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/FRX452026388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ece2e50e429b557793d46be52126f2bbb185765965ec97cc5881afc99984cf1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX452026390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f929b6ab095892b0a00bc63383ffed7fa6e6345baca4d4ad9eb347e2a873b03. 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/FRX452026393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d542d663559725bae57e518535b34c1876cb8d969de0fce93505ef113f0aad4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX452026394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2c0ef8a240c8227896ee85d11b9dd6442aa4336159177e71cb9a4acd54ae05. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX452026289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d7f1ecf5c3f2b335495edd35472ca3c5d6e0b6724bea5b0504ec782a70eb32. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX452026290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13f957303126da9e1b3de8ca8ec1b9fcb3f00c0f9cb043060d2d4e537156d42. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX452026302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524b8a9cae5b7ee1ee3aeb17f69e1ebc4a491d3c88b42cacb39c7094fa444072. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/FRX452030169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6cb226f03e47ed34f56f953b315497bbf75d53d21cc154937e7c0641746eec. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRX452030170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6359e14cf6c4b6cb9971db931a00169b0f751bed16ed463258f5da4d7aa129d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FRX452026383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53055aeef6a935ad8588a3dc8b7feab297a2917b60413063efdc3c1e8797bba9. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FRX452030182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3fd37df2b1d12e9c37ab391e6c11242c08a2c3a6964f0f797a45d4118a1fb6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRX452042495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8ba6474aca76cd3cd665d0ea4ddc4a5b6d443df9911a87ca3889d18e04269b. 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/FRX452042499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb471b4a316aad12278ad972e256f517514c730327506fbd534667bc8218eef3b. 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/FRX762137265.