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 0xd38f1fb1c5a25f045fe3f72bf5c638f731196b49255f857d7180948d2ee4f69c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d287e5d0-b7f4-49bb-b3d2-31eb7a127ac6.json and https://artists.proofprofile.net/proofs/artist/d287e5d0-b7f4-49bb-b3d2-31eb7a127ac6.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 0xc84b828d9cb159b74e3d68a47f912cfbbff27dc3c9b3b07abf0f39777757d605. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF071340501.
Stabat Mater: Cuius animam gementem…. O quam tristis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bf11e3ae115a01407edf70763c5d1e06e92d82e67b2484d58d30eb0e13789f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBF071340502.
Stabat Mater: Quis est homo qui non fleret…. Quis non posset
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92c99470c5184a9304628438ecedf035d8f70981252158753ad8cabcf3764dc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBF071340503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acbf287ca3eb480bc77de1401e807069a2725572df9a8c7f433dac3f6f4565a. 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/GBF071340504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c4424fe174ee664ecadd02bcd94056bc87743330115d0a21d4811837455871. 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/GBF071340505.
Stabat Mater: Eja Mater, fons amoris… Fac, ut ardeat … Sancta Mater… Tui nati vulnerati
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7384a6943474c82ade6099e6d95b75e956e2ba9e5b1a6750ba90c99a534ddb6. 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/GBF071340506.
Stabat Mater: Fac ut portem Christi mortem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03202f114033f089957072afea82a587425145d1032c469ed8e1ddd9c2ec506c. 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/GBF071340509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56ebd7aab6d90308b748549f02b87b98fd57ee66de09dbefb1e6d369dbd890. 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/GBF071340510.
Stabat Mater: Inflammatus e accensus…. Fac me cruce custodiri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c259885c0d467f9d14abcc0dd845b292e49cd424ac6caed330cb935799cd2a. 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/GBF071340511.
Stabat Mater: Quando corpus morietur… Fac ut animae donetur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a9c7dffca1ac6cae5de1ea8901aac93c54cf84249b0858f9a9772b91baed4e. 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/GBF071340512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d944779bf46aea7cd81833c1af96326f8f76b7ee0e5f715b311d53b98293e2d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF071301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1045c88c42266dca3a0406278231822efb5ef3d5c465e8932ba08999f0fef09. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF071301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bfa3134ab4321c75766a4c3754a9f3325c874f090f86bd758a4f7b96fe6d01. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBF071340508.
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 0x2fb654b6c72b77ef72e8acbe4e0b007ecc6af0ec41b18f66338ee0c2d17dad2b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBF071301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b997c1e7114226dbba6a8c7af2884944349ac9d0951dc90b6b96cbbfe85d31. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBF071301040.