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 0x6c539d4b687a032bffac52f0bc733d2fa9e95d3257d66185bdefd648b1e27b1a. 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/b2537ec1-ff5a-4bdd-b338-600e3d1993a2.json and https://artists.proofprofile.net/proofs/artist/b2537ec1-ff5a-4bdd-b338-600e3d1993a2.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 0xb694b3b81955231a256d6dac6c7a35bae661b99a6bb8ee44f024e444cdcccd81. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6F2426952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4881b9e72f684924e67ff1e313d3d4b74ea98f91d9e3eac9543845bc99ec660a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB62469740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408789fe174707007719f703e09adaac33e03ac5537496ca1bb936b329b9a148. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ762525988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa673d1e772c432241ef5305d374702b1c4381f299d4d9adbecf66410f47127c7. 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/QT3EX2411101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a95b9dce5f3bb65247fbddc3aaeba164ae62f064d23d38d16167e0bd82089a. 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/QT3EX2411103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899db67a10665b96781b95016d9b7fce589b7cd646d9240abe7af2c916412783. 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/QZWFK2434114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e26ca9b8356442452f3e116eb933083db7f8cbd809383bdc5448d4a1fb2140. 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/QZWFK2434115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd47da1f85f0e5ad969315bcc8ebd335aca77b869c3c2473df435eb42218c79a. 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/QZWFK2434116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6610365cb499eb1aa1ba15a9b950174328d96a021394d62862a6b728a7234a. 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/QZWFK2434117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750d8496fe7f20735160adea30c5f0f2204369815be3159c14aae6e647171481. 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/QZWFK2434118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde7c8e192681be41beaf7ef4a9c568eca378bad4e1824c87577233c51471b25. 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/QZWFK2434119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622f4029ad890ac12eba1618f9dc5098aa4b7761dfca649026d457fc8b911144. 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/QZWFK2434120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0747fae198621859882476f073927c53423ae379d6f460d100afa6ec186538. 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/QZWFK2434121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f1ea27a783f49035b6546941b910b185c8530c531d0d8b5eefc19b0dd16e4b. 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/QZWFK2434122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2ab9b30b05375684fa0980ac4a838ab7ba0709c39cda73bea12cd0d6f173e5. 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/QZWFK2434123.
marinheiro (como foi que entrou água dentro da canoa?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4802d840e9cc2d47ab950a7b9415a942a66ed4331450b36a086a7aed61290a6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFN2496419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768e6c764047dd7811a7ccdac3e7e13ce5450702f15d436f175b94c8b72b63eb. 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/QZTB72439724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61223d2c4ff06605426577c19119214f75b5f38215c9b160d3d99b0c2e5f484. 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/QT3F22475434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bdeec31b6792775fb4fd854bf4a71c3f9d1107d7339f3c804f1fb2f74a80ad. 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/QT3F22475435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ab778427ed96efb4c403ee3db24d7b71b79fb2ef120f316ca27f20eb274a40. 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/QT3F22475436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5af43123fa29c19bdb2c2cc132d60b2613a10d856b6ec0c1b7e70593180707. 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/QT3F22475437.