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 0x9ebff6fff71db27d470140a0abfc12780562e33bea18b1ab6023faed9b224175. 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/da9debaa-da6e-40f9-93e3-9cbbfde55011.json and https://artists.proofprofile.net/proofs/artist/da9debaa-da6e-40f9-93e3-9cbbfde55011.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 0x0a46aaee43004427bcb8d8fa7140f01b157cc7e1c8cf9ebcde56a8d6611056ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732429518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692d50d340438ae0607b29916d3b277ddde18389264dcc7a81d5adc8ed998fcc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ632201536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf887ebba62d12bbc64b78fc3070cbe1fda430c96ad12c0d8902c420b31e9441d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CNZ632201537.
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 0x2dbd6a55ba4a485b47911b9b838c5b89ff1554750c4ac095e4a59af1ed626438. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732319734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba4a9b6e06041c8046cc1c5363b28e76712cb81ddb875fb81c3f5d1084e0bb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732319735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b35e95a4025abcd7aa63edbd082bd63b021a796b60439b1fb67c261ab52d529. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNZ632401454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027774e9878cdd231a8dbdd2ff9d16dc2f7980c245efd57f4d24dd923dcf915d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNZ632401441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c9703264856ad214f290812b1c07674d0c88f1ba1ce06254a5e16e6169c80. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CNZ632401440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe681f3c1aab7bf002f19010c409d8146222cb2e02ff840011aa66f809e932a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ632400634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107ad6f6c3dd4e6a75ca58ddc32c730ce435d867849bb3162ce855fe57b968b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG731661311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e250d628058062b631d5bb8067182cc5cc43e141371a05579c2ee0d060a65. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKG732381638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa560d8890ea6339bd50df550c39a98f2c9d7aead5e3f3b286372dcce1d8ffabf. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/HKG732355993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9835be3edee3178fb3edf7eaade942d9f24e41c51160ebfae05df008624e00cd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKC992324567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e016413d94b7d68fc8ac596c443f8ae0ad8735be2816c420ac63ba5e3ea4f09. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKC992324568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac95e3b83e8d44c5e7ee9397dca8389fd6e85fcd0bf8601a5de0d86e7743961. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG732312971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbfa3a3459663732ab9a752c8ecfaa38bd647a346d197ad72ab2f281410f064. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731600123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28825fabbe2a1e4af557aa0683818fe226b1239df4f3c34a54119f7e168ed67f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732264823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7280f73f7dcd55b2c2e19c0cb862df92e842e1dfe4693782806965ccc82bf84. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732261853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f97998c9238d162b07656140f671feb67603aa55234b9ccf44aae95dd914053. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG731790833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15fe3c123f0dab8b20edd2687e69e4c0a11609db99ddda21e63cb35e775483a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732381640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce71650a083ff887266114e25127854f47c613585e24e16de6b2655d330f4a67. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG731401820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae8f056677477d167682b5096ea17da897bd1d95409921377500f58114838f7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732497288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea115971cfa064e6edc1380634fdf45cb7ecf37ac83088ad64c1c3555bfa5012. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QNSM12400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0edec1db9b1262047ac134c4733c80b5389315ae3e9a98cfd8654eb0778b106. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QNSM12400044.