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 0x65a8867ac0f08674278f42e2674ec199a902ff8582022002038d1693c0738f9d. 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/56d6bbfe-e74f-4dbf-9b09-85d0fc3ced27.json and https://artists.proofprofile.net/proofs/artist/56d6bbfe-e74f-4dbf-9b09-85d0fc3ced27.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 0x82978f04834c3d9ffd991f5dfcdc50573c5f6ce6cd3275460da6d775e608e043. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ARF037300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c798a530775057e3f1fedb4efb181edfb35bc54ea2423769e15ac4b87cfb088. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF037300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c94ff3acf4a4721ded5839469e5def5faa318ebbfc1f29eb940b41ebe654d75. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/ARF037400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0728b1b705fad922a2f6d8483b6d228e3b29ccb7bb279416648295c5d91b8fa2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:09:05Z), 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/ARF037300230.
Hagan el Pasito Con Carlitos "Pueblo" Rolán
La Felicidad / La Chevecha / Andá y Tirate al Río
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b24785074f23fce9239ce732f620dea3152f0b4bd0ff7c4e76894086cebec4f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF030500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873fb93801a3c78c356645d25041e87df9fe30636e11460e68b1038a8afd683a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARF030500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b70d09823e852cc127dc0141e8ed9cb3788bd70aab1150d048305626ed93816. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:08:49Z), 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/ARFSB0600587.
Que Llamen los Bomberos / El Paraguas / Bailando Con la Dolores / Un Piropo para Vos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7555b6b569b8a80e65ba622eaf9c983fedaefab25b17fea16e8587d142f05dc1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARFSB0600603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3b845f0b78e3f8de0aaf769de050455ed0de2f4126b8c7c369679908763c3c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARFSB0600590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82978f04834c3d9ffd991f5dfcdc50573c5f6ce6cd3275460da6d775e608e043. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ARF037300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89308f2e0c0c6233cdb7f4d6a547e76502aa019017a11e3020413f512ef1d3c7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF037200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873fb93801a3c78c356645d25041e87df9fe30636e11460e68b1038a8afd683a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARF030500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa69195421e2ac856c488b2451a26f4077e82d8e0a6448d5e75717a9f00445c. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/ARF037200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb150fae1abf7c67f4efaa7a47c1e05840303b0bab4ccc464be3220a42ae58eca. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:23:31Z), 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/ARF037200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70db75e593841f6d80b545199b01f0e3b764c6ca4372944c3d123ce8f8e9529b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARF030500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf208ffb70231a75b1673b610bcedf97b7012ddc7dfd0103e3f1c4458471cbd34. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ARF100800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756f9458e90492fa3497d62fed5b85ad83a8cf5805a24fadefd27b437366fce6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:09:58Z), 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/ARF038500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7555b6b569b8a80e65ba622eaf9c983fedaefab25b17fea16e8587d142f05dc1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:31:53Z), 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/ARFSB0600603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1ee6ef40d2d0c0ec0452a48901f2277b0e4ae347821b787f921f9bdc9fd4f6. 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/ARF037500015.