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 0x39238b7a6daf458fdafe1cbfdbf1f1e6b186d47b1f75d044787fd514e803067f. 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/fd751b7a-87f2-4ea8-b979-892ef02b8e0b.json and https://artists.proofprofile.net/proofs/artist/fd751b7a-87f2-4ea8-b979-892ef02b8e0b.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 0xee58b8713f2825bbc576425300a6a959c6fc01bbf8d7e8db6694f5ba9c5f5ee0. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USAGX0502431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e1a8a2bc2818ae4022332d182ec0674f94b19482071ca54d782d6320268978. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USAGX0502433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2197aa1bb4b4582678354f99f5b6cfb9066b5caa6c767f1e5110dba03c405fb8. 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/USAGX0502434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668574309627226e06a44bda4a0b8b4a1265748a922f2e545f7a3a1f6e96de2e. 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/USAGX0502436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cf9aa06250efc96d963fcc7e97355c435a816a6a6012e109fdc8312286f2b7. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USAGX0502439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3747cc4d4e4c3e26b88ffa9130c729e306beafe19c0f2cfa5d3b2841003ea44. 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/USAGX0502441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f5cc49b40a5eb7c3bd23a3d47aabcb80b39e709c31a9fc19b4878716304de7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USAGX0502442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa965aff370c8cef49caf2ff15c51f72442205d9b4961ac84506db2789ab1fc6c. 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/USAGX0505097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc5ccef1494fd6082c515e174e81ac5c3492e99344bb70c95e3624672fb8da0. 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/USAGX0505099.
Popurri Chilenas/La San Marquena/Arrinconamela
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff080726ce909469f736e859d57103348329e574fa54e100cd74579a15786abc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USAGX0505101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbb9654029f7b11a177379a70a9b011058fdb1487bbdd80fee591d8d11cb611. 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/USAGX0503350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85012aeeb12fa0e13a2b5557b8a8efbf599edb7a58058a445392bf52166f9452. 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/USAGX0503354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15753b7789d7562bd4955578d3c0b8e2653cbfcc73388e039b90fda847df7856. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:24:46Z), 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/QM6DC1511816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406d1fdd90bf174ac318e9a8b77c6c2d658e06ee8059ea0c16dcd9f510ae1a88. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM6DC1511822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29cb281fe939c139d2f5bcb71746a02f81bcaf57dac37f36a2988adfbbaf71f. 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/QM6DC1511823.
20 Boleros al Estilo de Domingo Valdivia el Consentido de la Costa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16956aace0fdd44f0d9720ea4b7e19e104b32749f9b558ab5aa1540192187f7d. 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/QZHZ42222442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec828d45a3b348baaaabdb506b6384deee4bd8a0fcdc334770aeae2383672b8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHZ42222445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1687b4e58cc45371c415d280bc8167f718b8266da5a0ca08b6411c49e09d0014. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZHZ42222446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4065df8a68a83560756435feca71ac3506571c7cc348de4941b8da4a0370f299. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHZ42222448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d54cdea16713dd59b8cd539bd91237fe3210e7fe55f6621b8a393363862153. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:33Z), 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/QZHZ42222450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e680dc6e295c1a901b3c0f2061d466fc2bff6907875ce9ff05ed4b10df83c3. 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/QZHZ42222451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ae00d9f2f4f5ca86aee0018c104b01e1d93892f3ae183af817a22f97243b62. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:12:01Z), 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/QZHZ42222457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba198d8d3dd2fdd01837d020eef27a971fc87834a240042b3a655501a7d2caa8. 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/QZHZ42222458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa4fc1e580ce00e44fa72c7fe066d1f38acbb5e6c4ec74eac69905d62e23ab5. 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/QM6DC1512284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f32c27036039c9580db3aee517f43e3bb9dc893fbe8d7a5952cbda39449da78. 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/QM6DC1512285.