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 0xfd0ccdcff1b7e411cdfed22e48a3e001a12d1ea29b200c597cf1ffe43d2e02a8. 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/e48316f6-2d9d-416a-bf33-c41a1504e08d.json and https://artists.proofprofile.net/proofs/artist/e48316f6-2d9d-416a-bf33-c41a1504e08d.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 0x6a38f3cc4455367312affe5a4717ad4d88d13a536820adbc85daf994dcdfe94b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZHNC2214153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3258cc0221817eba64bd6966ceb5689405b2a5020ae3ffd60d1829e4cd1bd0a. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZFZ72352599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d0b194ba6d4faf892d6924836185e189665f3adfda4303218c8d388e62b5d6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZRP42362148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621da544cd55ba7e8f35c1e07aad884bfe9d99bdad4070cdebc954c4a0cbf502. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAU2345815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec9fb0036752b9659a22204b1cacc0d365be24d83ccb9bd8bad133c5404d565. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZWFL2311685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e15bf9261b928938d56cb3a547ac888162f51fa2d6ed32d38f2f9d8dd37eec5. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZWFH2442617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fd17caf2517edf0dfc52b0b849aaf41273b0f2bffb25a929347921ae09e618. 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/QZZ792406598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d6c4a7d166e7076c90774811d39fc93ad8774ac97c30c0f19c14fc9de04e8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EX2461159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca2726b1604edd2da11201b8215921a0ce4e80248e8d31ee177d0a867cc1243. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTB22581148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf516afb90c86814341eba308306e6bf9d112c45f5ba2f6107d9f94d811fa1a0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7R2520144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aa0257ede0dbe6b996474c8f989ac2547cf23112223284af0da3254abe6630. 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/QT3EX2546558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4115ae2f353d48e9e6a531ebedb9d21adc0ae8faee07116663d84b50017af739. 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/QT3F32513373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd721e8237ab07840c14eaa4d6a50a8d28bc6f3b870faddd93732fdbc574b25a1. 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/QT3F72584447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba140db1c8f4b7b4c440bd021492453991ebb4415aa16a273169e183471199fc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QT3FD2524973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d4a1175d44e5f72080fffc08b0651df574d9a7888381199c0c371cbc57230. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT6E62535049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cca003536ee3147f137e5812a9b802957ece2085763add727413b279d86782f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QT6EA2537822.