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 0x32d356b1c7b3c7e32932510416cab768be6f470727b50a0f22154b9d8713096c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9013ab9c-5c51-4a55-bf87-74ea901de509.json and https://artists.proofprofile.net/proofs/artist/9013ab9c-5c51-4a55-bf87-74ea901de509.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 0xc37d3bb78c26040c9da376ca4c669dd59ec906fff996667b7070e376afa47e3e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:27Z), 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/QZHN92499725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0b4206e3eb87809b8d25f0ab3bf8208627c647978761d969b4ab28e60cd06d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6K2426808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629bc167bcc12b94ce0253d37a4cd87d2a8f52ca003f2c09f46d1ba3bd33664a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:55Z), 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/QZNWR2401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd168128239b6b6742a5728f4cdf2f44820aacdf9d6f92be08307e534534c4eb7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAZ2476064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b73ac92aa5b22ab362da07e2ffee6a2d1b72f4877ee55babdb5c5386805ac5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZPLR2436101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aea4f8b1ee058c49809607bccb402ee8e962e93d941daf3227f11dee29d0137. 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/QZWFV2450737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd168128239b6b6742a5728f4cdf2f44820aacdf9d6f92be08307e534534c4eb7. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTAZ2476064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aea4f8b1ee058c49809607bccb402ee8e962e93d941daf3227f11dee29d0137. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFV2450737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629bc167bcc12b94ce0253d37a4cd87d2a8f52ca003f2c09f46d1ba3bd33664a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWR2401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f41c523e3441a46fd8dcd2509efc35188c9b4e643dd7a6e9e5d9c6e89974ea4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7S2404401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03230125d6929c63aa4a949e3b3e9439f7455f714a56f38121d57bc2f7b8d35e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ762532326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ed98c1c82057124e54d0bcfb4167ace50ac212259d810f5bca8b0800a6d59d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT3FD2589881.