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 0x2695c2e751aa914a98678993a5620d8610ef86a41305746429a11d1defa71483. 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/782adc48-d572-4a52-8626-b4278f1ec230.json and https://artists.proofprofile.net/proofs/artist/782adc48-d572-4a52-8626-b4278f1ec230.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 0xa2ad6816771c3a411ef6e67dc0c29480c0afea91e7b66cd2a03ffd8023281be4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FIWMA1800221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315a1fe7749a676dd7d7b6f745383a22647f3721822a9e9228a3b194fd4cc046. 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/FIWMA1800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84adccd8c73e1e61aa543ec1f4b889e49b8f54848ee814f100dd57ae7a3d0b34. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FIWMA1800226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11582e08abae571641cb9743e29c947866de6597eb5692e1321b083c7b5dcad. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FIWMA1800228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb09b88fbf8ec0c431c2471857a7b9a2ac6693b109389d07c98634d2a3a3387. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:39:21Z), 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/FIWMA1800354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e30e109d2f8e8eeec4d4e98934ea8b5befc30939b8063615e601f2344d3e8d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FIWMA1900223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d6eca8f5867d2a3c603311c4af9bb3fa3d0f9a7b23e29de7e681e2c63bc47d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIWMA1900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0952ae17a89811960f41ec0ff222e27cee225da88101607c25bb33efc07bbc5. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FIWMA1900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dbfae3c7c7baeb31479bdc83ee0c01d13ce7e88ad0cb2cc1860d8e190abacb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIWMA1900309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f061a0511df67088aed59bd5be664eef355f162a372d9ae203de85de81ca34. 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/FIWMA2000242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b38c503f3764c05ed6442ed722b6602a62d296734a0b20f54a6922a40fdd41. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FIWMA2000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7b3bca154754da67b5658e31a579c3cee01d2d40cd38e5a618931863a2946d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FIWMA2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f061a0511df67088aed59bd5be664eef355f162a372d9ae203de85de81ca34. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FIWMA2000242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b38c503f3764c05ed6442ed722b6602a62d296734a0b20f54a6922a40fdd41. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FIWMA2000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbd93e6278be5cd641db0ad3776ec08b60d90bd9b9c87aa8241da18a6b8d4be. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIK3E2100501.