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 0x6b2138640555594771fec1cffa64af30df7d8c2982b6afc2143299ff1175e4a3. 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/4a3d852c-6123-401a-83c1-d73b128f3270.json and https://artists.proofprofile.net/proofs/artist/4a3d852c-6123-401a-83c1-d73b128f3270.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xffdb908479cbf6aafd667c7f493000b37d6b5a01a9385cd25846e63ff8966c25. 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/BKF442400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49199544d1578ae0fa10cd96163b6927ef4b000070bdff8b14da33c54d93d550. 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/BCE7P2400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac556b9d1ab119caeb16c1f7322493a309f8f51ebffe9a51b649a36b37662b0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNJV2454171.
Ela Joga a Bunda no Baile, Pode Vim Mulher Que Eu Te Faço X Hoje Tem Festa na Favela e Ela Senta por Cima de Mim Muito Bem Tipo um Trem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b88b5159e359d3c0fd7423631e92c9513284e9b69abd70d6eb369260ac3510. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BCE7P2401865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0158503b1242797079c8a5329e742ec582c895f2d4a258d200b8c55502ea50. 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/BCE7P2401866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb2df5658c891118aeb4dea78f7879b00eff298321d624365815107d8ae8128. 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/BCE7P2401867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581dfd5ebea0a677967a9633f1492a709c869bea55579dcf28badd8b6a0df81b. 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/ESA112561455.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc68b962a644638b9ece67a2f02fc1f84207e90da64c1f2733403d4ff9b2a490. 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/QZMZ92528260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd92cc1c99d3e9c128f78e7a45cc7de041a6366356663cd129c6741f73ccbf6. 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/BCVK92500984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413a14ab72af0291cc59520e80f5833f9d0f77f9766c462ca8397823194c50f2. 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/ESA112565731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa254d6356a0daf094372c76e1459dfefc374a954f6410be6bf32356fe17134f4. 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/BCE7P2402482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9328e3a5878a3f3fbdbdeab4755deb9d8552011d376881ccf712a1dabb9d4e44. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BCE7P2402014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969fd873f9b42d957221df4d7b4d41e3c64635b74453dff9322306470f67e65f. 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/QZNJX2440890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f3b2a0c10894f279ce9add53fd836e5fa3efe6d594c305d3d4baea2ec77400. 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/BKF442400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa894b769edd00d7b680458775234e33eaafe5117cc018255762a79d2667fc73. 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/QZNJX2440893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3690a78ac7479de61ac68ca7e57e1d38c760a22c12d9dbc987ce498629a66ca1. 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/QZNJX2440891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bd8dbcad72297cd377bac99141452f66f7cb1fc031da8df37c9983620a0ddc. 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/QZNJX2437306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddc8652bfff4a904a94d8fb851ebf8f575e1d20f35d1f296a68b8594f2b6b40. 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/BCE7P2403248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1652b493c94f744f78e146337cbabbe252b075d74c8dbaa47864a7611313089. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BCE7P2403250.