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 0xdca37155268f8e394170eb600e36d5bfa4abc942e69753d013678b70a9c46431. 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/25751f84-a9f7-49f5-982e-b4fe545d6739.json and https://artists.proofprofile.net/proofs/artist/25751f84-a9f7-49f5-982e-b4fe545d6739.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 0x1656177bf6d9e5474a687c44c7a404fe792a6ae7a0742e193c4c788eb170a3ec. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:21:31Z), 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/QZFZ42112870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f585cb42efb523c7e9f3a831f05d7df6dd8aae19c93baf17d12c4c31a937925. 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/QZDA82192389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceac98f5ef3ed3587cc5481111ddf1edcc06a13c5fb540de0402b3c8af34e3c7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:22Z), 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/QZHNB2146376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb078cb6dcbb757bebcbc0dd1ccb37ef908d476d18713d3c0261805d0acd996f0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:42Z), 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/QZTAT2166587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9207ced28b36d02a6a16f25884c2a9ff40661bdb8483569128c7502ee2ba70f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:32Z), 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/QZRP52221914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5949ad2fcbc7efd0c4a9135fc4f706b48371f745a29cb52fadb0600103e63e72. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP52221915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b28efae556e915f9d0475134087f0c3069a20ff548c55d70ab4c56cbffe1059. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP52221920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37bd795796e2efb3bfaa3720f62e92bfc2fcdaeaeee53b829a8f6376c84fdcf. 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/QZTB62243232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54da14bcb2c98d40c8f05e5917c650be2611e10fe96acca42cca2f283d91ea95. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMHP2335729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7b49fab7ef97b676d47fd9dc0bfd2d0552d54f5b15e6379351319fae430831. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB82449473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54acdf652b98ff7f3edbaff9e8a2a716c7feb1ac0c73ef1df917a28c37730d16. 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/QZFZ72528838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af34520466f862bbcc49d8fe248ded8709c1ad791be6289ddc9c62f7c31c8b5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ72528839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2394857cd3da05cd00d8dd34ed7d2e162f792386c38eba885a4b15dcbdb16aed. 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/QZNWZ2585537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62400a8e047018e5e1cf8daf8e30af46c6add3c5f7043ad81852cea79447f313. 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/QZWFW2579675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88edec16fa60789920ab65e5c358c9d25c892c4a6964fbac2161e8b2d1ced5a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/LVL152402027.