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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a9e94adad04e6286956127fd5c0256d23ad68ae4508c214aa936a3113edbf2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3102d3ae-97e9-4661-a51c-de6bababae54.json and https://artists.proofprofile.net/proofs/artist/3102d3ae-97e9-4661-a51c-de6bababae54.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5940147072a87ac820613674cdc3a7b5fb58fd81648f4a3cac97fb02000c62. 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/ES5161303036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dfef08145b2f6c5d5e7c885fe7b1b85769b1813828f9f29935e0cb88a53b5d. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/ES5161303268.
Sevillaneando. Sus 40 Mejores Sevillanas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b365e4969e7fe2102b1c989822630b492960572cc6376bde41a0b0ee4398f2. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:18:51Z), 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/ES6670600801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3077139af53022c8862504af8c7efbb033490acfd6340eacb080cf7e800d7123. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:50:27Z), 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/ES6670600805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b8573cfda0152508169ab62e894b7b9323decf42983b2938bf1c9b6688f649. 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/QZK6P2422451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052d40b8c5a4b7841298213cab545904cabfa13cff79966ce0f77aa647ae0a6f. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/ES6670801315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05c984302e7ac4c876889346fb1e0dee496e4de2af2688f257c37bfd1702302. 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/ES6670801317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1fe4cfe140caa70905ef3bef7243a752c3521d181daa153da2a98aed97172f. 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/ES5161303208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1fe4cfe140caa70905ef3bef7243a752c3521d181daa153da2a98aed97172f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5161303208.
Andalucia Canta y Baila por Sevillanas Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c5c8e4bbf9abd148cc3f8ed8ddc35e2a326031150ace72fd095c34a59b0848. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5161303019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b1801b042dca65aeabd78487a29f2aac3e7d4ab7dc082770eeeda5286008dc. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES5088900082.
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
A Bailar Sevillanas: 40 Sevillanas Inolvidables
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8383c2a865ce6668e931bf78d7b641fbadb072632cac9349cd8b570f595c7f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ES5088600094.
Las 40 Mejores Sevillanas de Amor Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a706b040ae823e8c833c8d06a6be8cb9d9a5bc04fe4c0234c1e9503de469ed. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES5161201754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079249bd38d1a5b083e763e2ed0d74e35b96c1b4ae6c37c2d033fa13a69561d8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5161303264.