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 0x497791d0acf6696e4fbc2a87458b4b0534c59d3dd583e4dbfc8278f68dcd894c. 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/d21eb67e-6db3-4739-8586-ff2f17744db4.json and https://artists.proofprofile.net/proofs/artist/d21eb67e-6db3-4739-8586-ff2f17744db4.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 0x4270d8ee94d0302543dd3aed7597417fa8fb01979914ba0f330d9788d527bb22. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BCFCV2500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baf7f6bc80c3e15a580412f47d452b0d375e9f81e41fa0911012618257186cf. 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/BCFCV2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf499474cbaf140e2d790b6883083e6b87bb1a9888316f4506cdbbfe956e72117. 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/BCFCV2401439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6547f7a52b2c9fc9e9d7e7a0b9b34e8c369b8998eb3299551dbb81fc4bdb6957. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCFCV2401391.
Senta na Ponta da Minha Vara, Senta no Meu, Vamos Fazer uma Enquete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3867d0c2c5b722fc771f290ec321889a80abae077b0febe9e4132bc4b8b39a. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BCFCV2401071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae308d3b0d89be67bdf2d9f2d58ad8db8ee2571956b5bac5f66c913371e62a2. 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/QZTVM2459033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460033ad5282e293ad37ebcda4a076b395212d625cd950a817250123d86461b2. 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/BCFCV2401055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f35cd923d0cbefb84ffe46325f85721d6a214885c13306d364fc08a6d78df87. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BCFCV2401047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65fb7428753b46a738e88ab47fece12ed538c1cc773ec4e272f035f9d745256. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BCFCV2400953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cadb9e52c076c8a7620d6c5e8959c9e6cf232b5043d3cbbbbfb94311231228. 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/QZNJZ2456286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baa582d3b0672e4f265f4d56386a828477ba3e49e05d76cca55ffcc9ea20b96. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJY2494625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0941d422c05b98a46259446f789910e20b86615a0e2f64dda12cff42a76b5183. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BCFCV2400746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ea6af6206f8f48f492db0a63b40b7a22ead8020de1ff06002f426c18d09e2f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BCIH82203384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7207cb62bdc1cf95f318100366e85c2e23fab10794e93387dab74dbb1cb9dd4. 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/QZTPX2321558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948fa5c3dab6ccba9f6efc307ec0a868bd2adff7c61f7cc31ebc55ff389151d7. 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/QZNJW2418253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8072913f1aa9fa8d636cf6f8c4e0cacb43143ac8288e75874df9c90acd088f7b. 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/QZW9K2266868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29234bc1c1118876eef6726df11691277a6a32a8b09a98efe2554fc3bb95c62. 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/BC1U32200651.