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 0xe30dfdc8a75fe2670afd64b0bcfd8f1c52b70d87b6f8b3f279a6fbcdd82041e7. 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/dc9d485f-3ab1-4c06-842e-4262f51cbef5.json and https://artists.proofprofile.net/proofs/artist/dc9d485f-3ab1-4c06-842e-4262f51cbef5.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 0x18b514962eb8496e8cdd2189eadbd290b452b6510821a74d9e57b083e22031d5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAIH2479917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3050053c980ba7e3beae8e4fde18a10999d95e44d25f442b30c8410fbfc9bb2f. 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/TCAIG2479919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d09f3d77dd7ae1d64c586fca709abf360e2792cfb94f0e0f12060cc3de7b6e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAIH2479924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cd76b87a3cc2ee10bbd912ff9b4d88e3399771bd56c993c5c49427454ace40. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAIG2479925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1458a3e521ce09f43ff14ebc07393af95e42856ad02fe03926fd0385e14214bb. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAIH2479926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6d48d9d6bc961523fef787d56c9f56c03e6edce0b9d5cbc53ba8643f32fca5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIH2479929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41430c592e3991073092bafe9affff21325e8f3932921f8dd8d54cdf7af33542. 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/TCAIG2479932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd7aa0664bf7cf3cc7ee7639fe201988f2cfcf5d30c1dbb44a1ddfccedb22de. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIG2479933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bd0f0f11447a3bbcb4c851b59fe3ca2d2bcf0fed18f7fe8bdae6346717e9fc. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAIG2479935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d01731561a4fc453203bc405184647bac92702dc11758df742c2d7741b4327. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIH2479938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2d123ad8d9d866481370f659f632071aa02844681df8516d229ee26bada56c. 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/TCAIH2479823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe394868860ae3d0425f05e24283bebc14a3e2cfd94ae473eb4dd793c2854a29. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAIG2479841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563bf8b019a318c5aa11ea6cdf655a95cd3a43ce28204ab6144ccbb4068fedd2. 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/TCAIG2479849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7ca2f8f6334061caffa33700896e8a12fe806e2f415677ae594c4f29bc9cfa. 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/TCAIG2479854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7347b6ee6f8c908a88f57ccfe9dbdc8083dedc4cc4050fffe49fb6e3db356d0e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIW2412999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f641bba468080be366b551e48b0c90d8f669430cb15a0c8c14b75a191862002. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAIW2413002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900ba29c82f43337a30c090bce0a2f2d0fb159e119c93dd7c4a29539f20df199. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIW2413003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39454e60cb7f3549dd5917f1edbc7f887bd1da9dc38cd0a5442aa82a9d0fd673. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAIW2413008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b464b953973c3a832ccd72ee1d7ee2b1819aa7104c97761bad250640b019e0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIW2413012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6708fcc61293d229605e21605adb4f3ed39c5763870233e98a017cdfd1c713. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAIW2413017.