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 0x21cf20742132282a4116d19a3d2c02f822a5aa0535c4c95ab116d02b00a4d704. 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/cd2dba1e-5a43-472c-8d64-82ab3e40a24f.json and https://artists.proofprofile.net/proofs/artist/cd2dba1e-5a43-472c-8d64-82ab3e40a24f.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 0x2fc99b20f139efc42679aa233cd4e514064514c1af1acaea489af31a9ae5f640. 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/ZZA0P2412147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4624cd9cb25848c3121ba0f5e45424cd226751dddf43b3ae58e6c34c39a3367e. 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/ZZA0P2410142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67a7e4d785f33d296fa2584d1e5e114a272a824f54d96ac4b1bb552b00a880. 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/ZZA0P2407504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cf4ef482db7d369b71bb097c7520b48ce6d3195b27167f8235d7e6a6ef3062. 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/ZZA0P2403093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bf3efdaffb8300da0a15462cbceb70e4016492ce5d91b4eb26f2e6643fe534. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZZA0P2403094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1410371db1b1e7ec6581e5efc44efa2e4fb1e6535a57f3de032beca333adf68f. 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/ZZA0P2311825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a16487bcf120aba109cf9e7eb586498f8848a70efce53e2fc9befb7e65dcda. 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/KSA012251038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dea648b39958d24ab653f979a94534023ee0401ca34a14668b2e4cca79a41f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/KSA012251039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b01c992f215d64977c5675e82bab13f3a7bdf8427bbe60a28d2d2bb9e81c5c. 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/TCJPV2343017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bf49102e4b816cd4e50ac045778b7debf61420babb4f78f9be5265d79d2d55. 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/KSA012238277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9c7cd97b8c49e83cb7056c9a5a3901e640a818488d5463fc79c0bf0eb74d55. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/KSA012238278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3939d6d1f219aca6253b363b0a57c3b8f058b2e454c9fc7b9ce7d7195275ce. 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/KRB472200899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ebf22273a862464085ce24ba11ab08e3a9d53c5d89cef98934281f4da5f73a. 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/KRB472200900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d195de901c6dc1dd7bac6339a9456e6bb3f117a4951656cf457766334caf627. 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/KRB472200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7fdc93c0867abcd47ace71befaa82d0136a494c38abd9a2453b555347abd43. 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/KRB472200902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9d0d6c9c18b82db1c12d19e2052f4d5971074821923771744870bad591220c. 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/KRB472200903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7db5717521ab7c9a38a1386f996fe944bda539703a2f63a2a52a869b7a67ef. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/KRB472200246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b20c88a6e3e4284af0bff47ab25d912470fba8d2c8630d7212ac2097fdc543e. 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/KRB472101851.