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 0x5aa2f3f39a86de330cec8c43b8163d0bbe682be392cbb85d1df5f37bd92efe78. 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/dce5d97d-37ef-4803-bf2b-815fb73f2700.json and https://artists.proofprofile.net/proofs/artist/dce5d97d-37ef-4803-bf2b-815fb73f2700.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 0xb9b93193744b81cb233872c7d34cc1fc4b3d3feac4feaf2783a596c98ccf9995. 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/GB2GX2000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe344a17ec42e17718187206a21661c5fe73ddc91c952130b537f9c7515d5231c. 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/GB2GX2100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfba589d122f3cc50e1952b0d8446bb55391ebc9eabcde2dbb65e41f73478b7d. 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/GBMA22108804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3634be41adc62a34343059a20ff2f20091ff3a7636ca1623274fbc8b843c5a9. 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/QZHNC2062704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630e23a3012cc4278c92ebe3b6d0bd99360ab900547065006fad07e0109cf2cc. 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/QZFYZ1966615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa2f6a1a4d8ace71479be827c396c112d546688e1d8ed987e99f91d61dfba43. 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/GBLFP2418247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a09a16f6eabb9f7f0b8e632f039c8e037048b9178d72c572496ff03e73617b1. 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/GBLFP2417398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b2b23f03512b0eea3a083003d266d8fe1b30537128aa58497455ae3b949436. 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/GBLFP2417400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dfe39e12e1a293e33c0f5a001b61b9b573a290901fd9ce03da411885825f71. 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/GBLFP2417402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbd22a857f01e47b696231b7073fb962ea2b23ea256bd5a748c3fd31854505b. 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/GBLFP2418119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a9312be301e489e45723aa86c0d80808b1e469c5e2f3e6c98db739807312d. 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/GBLFP2418082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1944f4cf89404ee9c604641c9f5bb58ef8e75aa02d239cd8f2b9147cab9c53. 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/GBLFP2418076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7e5dc4ea5c80a6eefdf4926cb48cd057b11b40a440c17093720445640a7b0b. 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/GB2GX2000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fed66795913503ebc41901ccacf4c46d7054fc0b32c4ea5b0fc6d1e08009ac4. 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/GB2GX2000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc80694f3fc23ffa72b7c3764805b14254edd92f7897f255a7593977d4f95cf. 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/GB2GX2000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce492dd819cc223e1b239302c360fb83fcd63c5b24405aa81bf67ce353145fc. 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/GB2GX2000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f22ee89c5bdf4bfc3f9e9ccac02bf92185951e95189b8f22b899c5cdb7b5fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2GX2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2289554239156ef73030892b0745cfe6e437e24be2544678f4d1736efac6166f. 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/GB2GX2000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0ae06d7dc8686c7f5ff7bbfba19bdab8fbb5d2c7cf0165a6c98d55dc580bb4. 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/GB2GX2000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dfc88eee0563db9901622f44c5f44aa673f2e0b3c5fa7d557933ca51f820f7. 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/GB2GX2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38095b78063d0b9e2a769f2f0212f53a505db03adb5d274b3b53a4f79838f24f. 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/GBLFP2427470.
Prevail (with Unknown T, Billy Billions, HitMan, Kay-O & Alchubbino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd24e8db849d83e3c22f4b5f7a01f7b9b092b9b3c3448123285c8f1e512c2b66. 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/GBLFP2485947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c92fddde2427bbf434e5ef580d114a799e216701fa2d23847614185e4db480. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBLFP2427476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef28e0f8b62719a5c20c2000822220e6e8b5b71fc07cf90c541ca0cedf90982. 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/GBLFP2240196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a09a16f6eabb9f7f0b8e632f039c8e037048b9178d72c572496ff03e73617b1. 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/GBLFP2417398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dfe39e12e1a293e33c0f5a001b61b9b573a290901fd9ce03da411885825f71. 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/GBLFP2417402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a9312be301e489e45723aa86c0d80808b1e469c5e2f3e6c98db739807312d. 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/GBLFP2418082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1944f4cf89404ee9c604641c9f5bb58ef8e75aa02d239cd8f2b9147cab9c53. 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/GBLFP2418076.