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 0xc6b36f4d7b3d8781e0f0639cf052a125567caa7c2ff4b1a99fda9bd2a118f7c5. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb17e940-311d-432a-9cb5-e3ef717caec4.json and https://artists.proofprofile.net/proofs/artist/bb17e940-311d-432a-9cb5-e3ef717caec4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reino de Ogum / Nação Guerreira / Homenagem à Nação Elefante / Verde e Vermelho / Nosso Rei Eudes Chagas
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 0x84f97985e852e51bfd33bba0159f186460f2a2164a4ba33dc95de5778b7f7041. 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/QZTPX2393938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad124095b5a6a2c4e872cee92fcea9416c988547990a9ef6cadde11d826a1dc. 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/QZTPX2393939.
Pot-Pourri: Cortejo Real / Batuqueiro, Olha a Onda / Salve o Rei, Salve a Rainha / Axécatu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681aff71750fcb906b5ba9b9c10fb0b3fccc8bd3a1240c9963e658bff696b316. 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/QZTPX2393940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84970bb57e8dd4f5dc22feba3f95e7882ad28e4c79b525e48fff90be787d0a1. 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/QZTPX2393949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad8a35b2346c32178cc7ba12e19506de04bd9cba36d0386acc13d95cea716a1. 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/QZTPX2393950.
Porto Rico Tem Fundamento / É Baque Trovão / Rei dos Maracatus / Nas Ondas do Mar Sagrado / Canta Forte Minha Nação / Que Baque É Esse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0441055f17d02bff61589289c289f5627ddfbee377f5b57ebc13ab68ebc6e0f. 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/QZTPX2393941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7afbfb6482cf0d7a95db8f16a633bd821246ec40da2bb0b129523760cce4a8. 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/QZTPX2393942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1910c5a7876660361ae59941af6de83f4ccd85dd41781d28689ed53ae1becf36. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTPX2393943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9882c213d5df99242b2b6a4bb16af70079f09590c33b06af752a529eef65a3. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTPX2393944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2c2b127928ae34496e658d9baf42f965bb1e1c845b66b9e551edb59abbcdcb. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZTPX2393946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9070b92be71f570c665fc6bf2ad990eb74b488e9b3a4dc793b2b95989af2b179. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTPX2393947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abde85312abd4f36f21576c03ee1e409e428aae382108c5d47c94c6e1f1d2bd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTPX2393948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45928645a27fd33149fabec0aa52e914d45ed4dc2d45db33feed3763ef2cfa8f. 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/QZ5AB2011724.
Eu Vi a Terra Tremer / O Canto da Sereia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f80e53d67d65961fcaeef6d123bb16ae92c9d8dfedf041e42bb2b11ca00269b. 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/QZ5AB2011725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2cf29d8ba8b876c35de73df021a0f63848b11f451b3238461fc58bda60251. 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/QZ5AB2011726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1f45de933ecd23379b7005aef3f23420f9f39afc284f79e23c603681a6b37c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ5AB2011727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832df4bbfde422b9a1ff70522a6209aeaa43b42bac93a79e19c5afcadd4534f0. 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/QZ5AB2011728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b6505067bbe8789b2dd2ff788f3bc48df1726ef6f47479e868ee2a59d75cc. 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/QZ5AB2011729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83651c617899a57684c4321a4c6bbba09206a2e86878d23a1f7a79a66a833c7f. 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/QZ5AB2011730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874154fef4f80767aec144a5969f53dddb11ecf53f5961d05b6ca346d4c82d27. 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/QZ5AB2011731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd015606e7ebbad81cf4ccf5ae032204860ff61cbb39c0e188d70bb779267e0. 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/QZ5AB2011732.
Nas Águas Verdes do Mar / Baque de Guerra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40208158f70cb3bd26fc540f9eb05dd6e93364b93e1380772e986d6eb3b11149. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ5AB2011733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6dee085787801e970b1d4f67e25d029ace2b17498ddfbae514156d7aacaf1c. 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/QZ5AB2011734.
Miçanga em Luanda / Oleruê / Porto Rico Tem História / Santa Maria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d72e8baae4d40bc998f5dbe880163ec87f829fa66f2d3ad663b3ea21f367c2. 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/QZ5AB2011735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9562200098ef3e633d0165de5d05b9bf193bf22a39620ca1c76c0c3d83ab9a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZ5AB2011736.