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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57392f7d524a855f8732bf06f00bac80f54e4936a87290dcdd03de4a3b15f7a4. 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/efe23d27-0e76-4f59-98eb-9372df4b3806.json and https://artists.proofprofile.net/proofs/artist/efe23d27-0e76-4f59-98eb-9372df4b3806.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc650cfacea8f24e0db419ee84e85fae8f4c2fb09470247c84ed72646613cbf75. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXNT61902710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bde9f625723992c432443ca2651b3f39920a5b20fb20ec87a2836e729a76ffa. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BKGNR2300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf64405ff9dff728c66db8e3156aace9e7c53ad7771a72f8857928a27780f5e. 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/BKGNR2300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486306b9158b38fe756313f1d1aa298300de78cb6b61eb41bf66e547897fa18b. 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/BKGNR2300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd450670e6d42ec21669328e69fd473d17b945daad8dbeeac02a8df9b4bce58c0. 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/BCK6O2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fde4f3c488779efbac98945d5f61209e5b356f64ed3da2660b011360f5a1466. 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/BCK6O2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c60bdd5b5e7131aea1d2ceee995d1cbc5f28f541d626a6617883d5c0ef162a. 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/NL8RL2460208.
Te Esquecer é Impossível / Sou Seu Fã / Pra Falar a Verdade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3911d519ddb1abbbaa8ae5d36792760ec5feb4e7266d6230460fc14c56eb7. 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/FR96X2570071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae45f666c08c4a758595f805be1582537bbc28cb2824cbc342ac6ebfeed3e65f. 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/FR96X2570072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fdc43a350f7c81e6fe67165c67eae7a42fb4b1ea30fc9750bc48a6c81658d0. 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/FR96X2570073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46079ef7879699d5ead9f76e62b0081f3c482fef3ab9df862c54587186c2a274. 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/FR96X2570074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29318a3bf2451b09ed1e529d592e81af98dc2da4409b3c4a8855c58c5eb36c2. 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/FR96X2570075.
Assim Você Mata o Papai / Pagode ou Sertanejo / Quem Nunca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6562944e8555e90a7fd45f6bfe70f5bd1052f03b60982e2a4515a7cd72ae01. 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/FR96X2570076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb6a6905820a5e5b889d0a457f7e6fdc7f917dcf19c151850a3e977d1fe617. 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/FR96X2570077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7590f5dc9a559009ccd62d6aa2ab35df4dd00d69de2ba4e870f273416c61fb43. 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/FR96X2570078.
Tô Voltando Pra Ficar / Capricha Gaiteiro / Pra Dançar Vaneira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb75ba82c13c5c622bf267f82c7b32861938cb21a03502678e6896480fa9ab02. 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/FR96X2570079.
Nóis Não Vive Sem Muié / Se A Casa Cair / Lepo Lepo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1b604d0bfb9decbb7193c307487224e0e0b2005273345d25fc61b2673dbeb4. 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/FR96X2570080.
A Vida de Pescador / Abra a Porta, Mariquinha / Entre o Rodeio e Você
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439ec5540f24f5491a7153cc0eb109232464b07b1ea6b7095d9db37c37a899ee. 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/FR96X2570081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818d4b263babfcda70b07f10192c250e6e38765ed55c7e742e68302ce566b55e. 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/NLRD52354716.
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