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 0x071c3d79ddc7b0421affa2d37de3dadb1835f107cd0fd89535c43aec6064a856. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80868e98-67e5-4bcb-aa01-bfe3a0bd459e.json and https://artists.proofprofile.net/proofs/artist/80868e98-67e5-4bcb-aa01-bfe3a0bd459e.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 0x639f67772b247ecfac6f78fa61d2f89c14e2238eedcf6a408687b80f8babc6ec. 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/HUAC60600291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0219927195243e687bfbf4e288e6981e8fd549e39a585655a3ed0b0a865d7575. 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/HUAC61100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b56ca4e808140af8ceb3560af9e39e6f3632fb14ffae9083ef63646215046e. 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/HUB001400090.
Képzelt Riport Egy Amerikai Popfesztiválról
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4202372920f89b1ba89c4fc51c478f9e815a24fe24fe904419eaf7cb63107b2. 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/HUAC60401117.
Az Éjjel Soha Nem Ér Véget - Infinity Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa961f721d81bd4a4e4d98438606df493a775026d75b33e56eb59d691cded6496. 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/HUAC60401126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3b9d593a71e5cd683b8814e42b3184f8738af2dfea8eddaf6b67a099dfe6a8. 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/HUAC60401074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173129bc9dc0a9329340362fb18a5608577c2470db9b077ea12f693a636b9e93. 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/HUAC60401075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a695e821e77034e7d79af2bbaf0ad152383c3798326ca1ca2e8a142b151fe5. 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/HUAC60401076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304e386a8c2505ddb87e3c3e443a6e0ebe872f087d14a6302c8e4d65d8ba42c0. 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/HUAC60401077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b7640e035701c1d526283ba88a13121bdc1f4dc1fcc1b6107adf8bfe43a6b. 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/HUAC60401078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7396ca5ac7076acc1884805a324ead038f071ac1179f6d95b9327e94ec2a01b. 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/HUAC60401079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb45861ee731ad0969a716ed6caf9b4f63bde8bf1a6959c58959a8a50d29af6. 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/HUAC60401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609c552bfb8f02aeb44fef3c4b1f468a5ccf045f4d90dce299b49dc2d8bb4f7. 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/HUAC60401081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5de76e8fa38d74bba29d3255ed72b86f5013d025d6455012e158d7754f2b334. 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/HUAC60401082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5768412ed071623bc958a70fdc01dfc0b868207f9181f6bf0c6faff3b5bdac5d. 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/HUAC60401083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c12051423f6c12ba12b9011c3117e1721b80362a19e121d34d349608ed48b7e. 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/HUAC60401084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eea811a36b14196b9532bd7706d6e6fd7f3f4681ae282b36f690e1ecc8bf52. 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/HUAC60401085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f47db069828bc9ff44e9177b4bc4e4f26d46e89310b9247cc409504ff886fe. 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/HUAC60601077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad80fb35fbdb78c5e9639303960bbf03256e9f8b56b89f431d6fb6df8c34d259. 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/HUAC60601081.