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 0x68eca7441880230e5e02aaba10b80522aaddc3444e9fe2114b511e8a44e26fe2. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5500d0e-5969-41d1-999a-809a8adee2d1.json and https://artists.proofprofile.net/proofs/artist/f5500d0e-5969-41d1-999a-809a8adee2d1.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 0x130376852e875810f97f51247ff80e666303bb1f9628e481b6640191bd08fd6a. 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/ES71G2318436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cd63a68712965c73530eefd9e20569022ea035600289ebf59846ade44456f6. 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/ES71G2205948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86378b3b42aeb8cb441110a3889a81a955d46bb327c0fa6bbb9d666973088aea. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ES71G2146854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd06873b2978b7a0ff8ad65704eca4f274ead7334c1403d046764850c48d8ef0. 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/ES71G2211541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb515e51d78d080e499fa0d8eebb4db8c5a52448c6aaae22d62fd1be6f6330. 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/ES71G2239996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413426e263247de8ea5d8d4e51b4342cb5b72fe895cfa32e3ec673bab8e71318. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES71G2326143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79748116199b8627581a1a43235ce9cab7e701ada2913bd85b53354ef0105a5. 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/ES71G2411775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd06873b2978b7a0ff8ad65704eca4f274ead7334c1403d046764850c48d8ef0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2211541.
A Viagem dos Capitães da Areia a Bordo do Apolo 70
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4f0e43175f3f5c86845b3183523e3bf096685bfa72c2a7596c0a6a310b8308. 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/PTPA11400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85225a90d00717eb703458b1f378ce774cfbbca867b51077f55ad76a8d0b861. 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/PTPA11400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce85c6869dd0e3f6e23200e37d9f302411fd02466afb2fcade4c120d95c1787. 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/PTPA11400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed92c4c96d7cf69c040ce7fe3f397ec80665bc5971fa5ebdb43b088a076e266. 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/PTPA11400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80d5b268b7c31b7bac4bc347af9bda010b46389040ad40368767e16c8ca4ef6. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/PTPA11400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bc4f29b48fccdda74f7dabec4a87b0bb451d4b6df0595cf0ffa3ee92ff9d25. 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/PTPA11400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef521ef79ad63e49caa4626dc04d15584a180f2eae25036ba8fbfe32e3e91d7. 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/PTPA11400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a325261fe8f2675d3da4f53071cc8e24db86a7ce8d0560fffe9c08c7672d666. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PTPA11400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671e645f3bf04f9088770931ac54ac94f998ee19c7a0b7891f89993f39fee57b. 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/PTPA11400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549af37fc76c3da1cd10b8ef3d54599bb6a54e44ae5173ec391c71c3b349f010. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PTPA11400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086a08ae01d6533674168f21d8046b22086c31169568c9bb401a73c7dde7332d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES71G2404822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6813ce561cab5d715ade03eaeee6ce9065d0476173e5fd22e1a85a329440fc3d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES71G2408179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f5bdcd82766a535ecf68f005ef390032b7d55021cd16da67a4f8555d29f2b2. 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/ES71G2215348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94ec645227cf2710f1754514b283bc02977fb643b7693511eb714689bd1fcbb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES71G2405769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ed27098421d61dbb5b5aaf4a9b6ae83b3fb9f4cfc489abd65b199a873340e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES71G2410224.
Um Leve Início de Surdez/Colecção 1—Canções Para Amigos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1694fe5bed2b2cbada3be63fc8950fda3fbc25a51f3c4845735965c205898f0c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/PT2A01820001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f86389cd688231251269c695b5364276726f243683a73589270f59a83ff575e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PT2A01820002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65afcb6f0da40723b1d025f4f84794d70bcdc85506ae5e139ee8212773b2b06. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PT2A01820003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5a6968997e8030a43f5dce42a7b627111de601d0c5ee9f452455fef9574b83. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PT2A01820004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4563e7a6669591e37f5b9a78f39141f2df5eda273a780da6228fe33fd3024638. 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/PT2A01820005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff778da1b9e4120cb0234c46342b3c204cdaf0591da3a757036b699b76ee0401. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT2A01820006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b54e974b532f527ea96825a007105a023a62af67be5e2e7c21b485d4321431. 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/PT2A01820007.
Bom dia (para ouvir o Caleb tocar bateria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86378b3b42aeb8cb441110a3889a81a955d46bb327c0fa6bbb9d666973088aea. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ES71G2146854.
Dois Brasileiros Apaixonados em Portugal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44f7049a7c31ac97665b0e43cb7fb7b9a8e1c67ec43c7823ab53beb0b856a9a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ES71G2504364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbcce4ae36760c2ce8337b61a5066685888100ea50a8a09047ff0967b77e810. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES71G2501439.
Amamos Duvall de Tiago Guillul - Disco 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf826637b1a64188def66f7d13427fc2430239d345c5bcaaec935346da0cdea77. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N22566104.