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 0x240aa34bebee7e90955c452cdc0620228a0b72e3d67e7e997377a0b952f25c31. 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/518b2b4a-4ef6-4e8b-9b81-8f121f28110b.json and https://artists.proofprofile.net/proofs/artist/518b2b4a-4ef6-4e8b-9b81-8f121f28110b.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 0x9559d35b41cad867abd64c4855fccf198b791dc88a8b417c80a5337bc1f99d73. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ING211006137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa50ebd5ed940feb706c64a514ee48c76098af75ba5b638c40f7391f3a0a6e10. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZRP52291971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcacdbbd8bbd4d8ac777a7634541db54359bb5e02a1f69a31c953faedfd8e66. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZRP52291972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82dc56e7c1516075b945822b0c87558469a9537af6954623d50b733066c4fe5. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZRP52291973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f24677f395ee0a675fb7af5c78d17603e39fca881103c283113da2e936b5498. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAX2200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbded32c0b424a9ffe468cb5b4fba2352980e9cdca933a514be56f632c8c42e16. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAX2200319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7958a9cc5e959aa53eef3c9284953ea26c12f81d2f756b9fed04990f4e86cc37. 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/QZTAX2200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea33ac2ee96802037be5bac349ad1f84683b385e98b23f0345f1e12b2778191. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:07:31Z), 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/QZTAX2200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b355fe5af732068ee87c30fda6eefadd72f25d13c40dc1d2218e1aa24a1e380. 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/QZTAX2200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fced2c9bf0556006bf4824de289341231be34a36d09579ab49da8355ebfacd4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAX2200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13d64128c82b2567ff357257095db82645c55fa5a407cf4dd5cf3614405b0e2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2218830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd4603f503582e6bbe1f695cd408a4c8a68b671fc671a3a0378c9d882f91588. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:36:59Z), 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/QZDA82384755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb3000fe2e8f8877ff3f15ce50f9e4ccc2338d1a7d313b6ebd611bfafc04598. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:15Z), 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/QZDA82384756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec699bfe570c05ff9b4ef5a461fe0c991e8c2d7e6e11e5411852e8d920593a. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZDA82384758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412474250b073b2ead826464dbb6aa762f7bf656ed3036197c6308c62b93b67d. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTAS2352533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca161a3c85e1c0e6076c751e5f16254338e20ee2c06d49665375ba172b0059a9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZDA72458569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ca39728d2018bfebb8d96ef76a47275016cd303ab827bc5944602d12ce14b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZDA72458570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9cef043b00fbd936a7cbbec02db5a1e98643acd5c47f9fb2328cf8d67d5fdc. 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/QZES52406752.