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 0x209bad081732d49f7894dd438df3d2624d13a1ff0868e60b21a408af0fbfb210. 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/e3003e7d-13ef-46e4-83b1-3e2aef356b85.json and https://artists.proofprofile.net/proofs/artist/e3003e7d-13ef-46e4-83b1-3e2aef356b85.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 0xd5b7483bee22a1cfbbfeca48c20d1c521b4ef47555e2adc5ac179071ace37f9c. 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/NLRD52203725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f99d557fae48af0602e6d0cd2b56b60904b08c8b8b0bd5b2d36de792b69713. 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/QZHN62251961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa995e73814b68e1194325b5f24b5f759ed40a919a85b1c3ebca75f95a431e65b. 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/QZHN62251962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ef2dbe0ccd854fb01094a4a357387d07a6e224f5b85d2225756dfef5b39787. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/NLD682303775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3a39a752e75f692c855442398211c1581f36d2b53acb2e49b4e8ae8f4b7a8e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLE712300738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3752d5547fea796f31ecee028a63c8372ad31a774436e6089a62035ecc0d8295. 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/PLA552300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1611141e68e4a6423c23195e3aeb8fab08e502341c4d5774d1ebb59223e7ab. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PLA552300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb7c3d06ac9e9201e21c2840db29dee8d1a9df917cd7897a89c6da038e2b1f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/HRA112363301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cd6c15bdc4567ba3b62c029eb255bb0f3ace1400a7423c7d0c2d9c6213238a. 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/GBLV62215147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc6a200550e0b9b35b8c2a69ede527f7b403db704bf9bd9dbf37ee58a84e6b7. 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/NLE712200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3478e94a296ef806de56c4cf98bbc820ad98b153b0d14fe679de6067a8c7f197. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNWQ2192227.
Zatvaram K'o Carola - Mike & Me Radio Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1532249fa0c0037f1248b1fec6f4edffab3ccebd3c6b60ddbf1b8bfdb9237e58. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/HRA102109580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5b7456dec4385ee1a1621e7077a190314e387899e092a3e5bbc6924a8ca5a6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBLV62104539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58de04048b1482c092c7a70022389b92bee674e88f6d9493fb5c9b46d6a00df. 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/BEE202100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9903d80823a49ce8e377579e0e82b04cede83e4f25f6690cbc474a0845abf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US83Z2050571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af4ca92361dbe52b910ed6c2a6599858e27a2ccc91b4ede55e79079f3920aaa. 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/QM6P42052592.
Samba de Janeiro - The Bootleg Remixes, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f83607a473c47b4bf4257a847fa2b4957cdaf85a285d3c4ceb4373606cab09. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DEPI82310421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75e4045b0ba089619d0459ccdd05237c59adea50993b58098127b2057dfedea. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEPI82310423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd3068ec661ffb262e33eb2270fff5f8af3c5454eafc62fc63dc3b4ac01eb7f. 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/DEPI82310424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfd518498664c719da09366d9426158b99fc0e7087d2ec31e0a8eeb007d9da6. 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/NLE712200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885e207f3cb4fad7754713ffd56c291f66d5c47052849b88d3449705ff1b5a2f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEH742310643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab3773a0dbc1e049f77d622f87828f295d859020090a69573f31dedeec50f0. 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/GBKQU2562064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fed9eb99ed8e409bbd4f7b19a4adeee91ed39ec64f8066473cd6fcda578fa8b. 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/USLQ22180888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ec713b2005e9c18a360d34365f58e478b603c9f24ae82bb86c539b1dc6b49c. 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/USLQ22180889.