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 0x3bb4c0ad72f35046b9583238e4e8b356ebd1f849804b8cbe48715f429315305d. 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/b49f5491-15c6-4ded-b9d0-0d9a2dad6a6e.json and https://artists.proofprofile.net/proofs/artist/b49f5491-15c6-4ded-b9d0-0d9a2dad6a6e.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 0xe5698469d8a3af4d7e7c50be5040f9d074df1ff6ee061b8ef5ed47df583f381f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:45:32Z), 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/QZ5AB1926739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df2a21060c32195c2494d39786c00284efe670d61f1c5bae310ee2fba4a136f. 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/QZ5AB1926750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5698469d8a3af4d7e7c50be5040f9d074df1ff6ee061b8ef5ed47df583f381f. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZ5AB1926739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0631dec382b5a5b25ef47eedec79900262a433210fef5c2962f46c895bf8e21d. 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/QZ5AB1926915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d51d481c3526287d4323407986f46310b0c641886c97dc6add7415584955991. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZ5AB1926924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0631dec382b5a5b25ef47eedec79900262a433210fef5c2962f46c895bf8e21d. 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/QZ5AB1926915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2594599107e9ae7cd5643cb2d97ff3268d5cbc73e6c366cac846124dc48580. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1931147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4d0fc4f216d14474c8cdc3fcac1a1a16f47b703d534125104877996ef55198. 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/QZ5AB1930985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2505f8719a7bbf290f408ee1f162a18d99c9571977cdc4c934293e3fa5579fa3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR10S2592118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64de86a77a501e41c8ef4be32f093bbbb7be5fe2b43442831e966e41fcf2cdb. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZ5AB1926595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7cd11f0eefc80700ed0f88ab8b48ea68d1098906f0c9469fe2c41b67c74e87. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1926597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddefc6a561040b37ef24d6c5593d746c9f5344865cbba3cad8380d28861a71f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ5AB1926598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450c13abbf7237ed67f0727fc369ae863d097e59b535d1add34af383567a0912. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZGLS1944074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8239d91270fb3832a1cad4f3e70ad9cbe2992e99671205a664ebe65e465cf1ff. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZGLS1944079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbcaa20f4fd4cc412d7962974aa77b72b13a6247090f39feaa96d7084c3dc0d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX762061129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbcaa20f4fd4cc412d7962974aa77b72b13a6247090f39feaa96d7084c3dc0d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762061129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1398f77c078524bd4e1056da7b48595ca60326b8c2245dc77643441906b273. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR96X2218053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bedfc5bd968b3368c96d884ed588e7f4b804626647ab161b40dae367b6e6ca6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X2218058.
Mosaico Cimarronero: La Negra Rosa / Sentimiento en el Conuco / El que se Moría por Ti / No te Tengo Fe / Guayabo Salvaje / Vivo Enamorado del Llano / Tierra Negra / El Guate