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 0xd9d9b4215866b065b346a3e53b3e29dd04c835f3cb35693879bd4bdcce633922. 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/15bc86a7-d495-42c4-a424-8367796d1adb.json and https://artists.proofprofile.net/proofs/artist/15bc86a7-d495-42c4-a424-8367796d1adb.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 0x5452a1c27f450490c5f6bebc7fcf2cb38d07e5b8de571b1968124c3d2960085e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXTB12200207.
Seu Eu Chorar / Espelho / Querendo Te Amar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d6ef3681fb23ca19a5a20ac7e12c6475bb223f6932b2181a7cf276ffdf8ffb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJY2021365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50147ddcbf8f2e9328203c3ce6394c429137860dfa7e2c5141e035bcedda086c. 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/QZNJY2021368.
Saudades de Mim / Eu Ainda Te Amo / Um Beijo pra Me Enlouquecer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cf85ab4549e46aef532b588c04c9ef11923d3270fe679eaf7044c2e091c912. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJY2021369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa222d8f3b00e04503c5997590d613eb63d5605338331cb1adaeae9394815c8f6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJY2021370.
Desejos / Do Brasil a Argentina / Onde Haja Sol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c2057209dc61aa06c79f6d8effadde933c4260fa91dec05bd17e1c45893d3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJY2021372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17722305a35047c6b2511f41244d730826fa05f4670ecc272fa575605fcd80cf. 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/BR5K41700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0de68fd817d3985081d30114cc83374a767d5a14b75022ac3ddbfff96d416da. 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/BXTB12300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8794bc416ac365b204276fb223b80027f9d084f8fcc83483691ca509f79b778c. 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/BXTB12300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caa5c6cce05f8110ad54dd6e77aee7a98823dc4d7b6dd8c4ec2fc3ff83951cc. 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/BXTB12300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5576c4859b4aa17adff897a55e8dd3df6fe02a8f519fbeb46ce3decb04dac1ae. 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/BXTB12300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df0a1dfb2996a20474adcfc2a5557a12b10cc539340eaf7777f91179a764c5e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXTB12300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98496fca4fad5f8d222216b69b04e2ff9ad3baa7405bc50e69a63928741c078. 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/BXTB12300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60f226311eb015fada48bb8cbbb8f5f4ddc4829e55785675c209cfd3a4f4d9a. 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/BXTB12300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5f60b9b203e2ce65ea8a7d6c565498a573ce28d68bc114429008ad7aa66c55. 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/BXTB12300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ac62e694d8802d911fbdb6b12a16d43e9f3b6ca15cf2853882c5ebce50f297. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BXTB12200375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4ff0411efdbefa943548a3c66badf98523ab47968f5801821d9dd807c19297. 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/BXTB12200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd0a3cc9914b8caedd254a44d5e4618334154283f15b8c12fcbce5490ea9443. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BXTB12100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429a00340409851f720124301f5a8e1eea7f5a91eea256220669cfde9ec3027a. 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/BXTB12100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5155338f436df95834fbecc070ebf17c8b679098b75df6c45a632b924a7e7c0. 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/BXTB12000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baf603295b38725b18538923793f25ddeb3e396b1a1898f3324cdbcde34a1e5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BXTB12300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60f226311eb015fada48bb8cbbb8f5f4ddc4829e55785675c209cfd3a4f4d9a. 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/BXTB12300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caa5c6cce05f8110ad54dd6e77aee7a98823dc4d7b6dd8c4ec2fc3ff83951cc. 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/BXTB12300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0de68fd817d3985081d30114cc83374a767d5a14b75022ac3ddbfff96d416da. 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/BXTB12300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5f60b9b203e2ce65ea8a7d6c565498a573ce28d68bc114429008ad7aa66c55. 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/BXTB12300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de3080531d08c9cdc4acc9f67aa40d89c8803ae595f8dfd9d454442b5faf9f2. 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/BXTB11800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a098aa0f2906682e0fb0c8f0d468b787a991b6247d719c6263b5ef226b8b743. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BXA8E1900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc019331e40fa4fcea6fd0c2bbd07195cfed321eb2acdbefbff12cd0aa15c1f. 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/BXTB12000081.