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 0x6ab792abe7aa427bd4f5b93e85f87b57d333d78edcb8c4771cbfc43afe3fc475. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22b57be1-e47b-4093-ab29-6c34d5d62d5a.json and https://artists.proofprofile.net/proofs/artist/22b57be1-e47b-4093-ab29-6c34d5d62d5a.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 0xca5d9e0e17359550f86f08138cb2432ec169138edaf3f564dc5987cc0ced7c3e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USQX91902542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb30a7f2a5ea041522c2d16e0732fa7ea2d91f2975481067dc1c41fa4ff2e29. 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/USQX91901794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d7e5a4cc13ad72ede414506803c87dfabe5afb4b6fe14a8a55da24cd3d5bb7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:19Z), 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/USQX92000788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a66b2940902c3cd2191f9e9aad31930557aae98b19d083c3e384c0bf1882c30. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USQX92004405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebebe3a4a000f82531160c990567892338aecfdb4958c629dff8d91642de9a8d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USQX92204786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe772fc8350eadb3a6a57c89338a2ed3c20412dec2c1a7314d8000cc36464d427. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USQX92206227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52734f8bbb207e84a2638b4a1aff0d55d2f27ada1454adc8901a98e9de21954d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USQX92300874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332cbb4867ab7d593907e7756936f691e45ed0968ebcc8b7fa077b5fe148844d. 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/USQX92300875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c31028a7894b9b94006dbdf1c6fdcc35afcc5e758da6090024aa8e48dfe2a3. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USQX92300871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e0ec5356443820d1d5a638670d2c51cc2324dffc33ad7076fc4f80e4a76fb8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USQX92300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf661b4238d1482a33d594bbf27bec1b4b16bea55fbfa01271520ee4e871dcc9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USQX92203146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331ad9d4cbbdbe056f16c5caa19b71013cbbd9efdde3a493657a50bf45f835ca. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USQX92300873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bb9f89fc63ce43b98deb598683444ba67b5b27d2d40fd94ac252741d1a84fa. 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/QZTLA2406087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72e03b936fc2941cf7838cd8c7a35d8470e1cffacc0d24f566364154f3330d6. 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/QZQAY2177174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddc31bb1d01261778bc5c60d1e20ef012ee6ae74995fa79592f99cc53f4f5a6. 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/USQX92005739.