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 0x55503914b6bcc06ce385eabce87ea42a025d9da61d3549de931d67dcc1cf9900. 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/d62a935f-90e3-4685-90f9-cfe812bdfb79.json and https://artists.proofprofile.net/proofs/artist/d62a935f-90e3-4685-90f9-cfe812bdfb79.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 0x73da29c7a3d956cffe0f9266da1ba3c549c6c1ad8b107c181a0a1f61f54821fb. 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/QZDA72142728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36a81bd8d7a2f6f2242ca4017f69d25cc3aacd48834b4282d92f20670f6fed9. 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/QZDA72111056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1163fc9b5b8ea778df84ae7419ad1d8d72e468e796d1f6da6755b746163e5c0d. 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/QZDA52386915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b2a5539b7999029c7eb730136e84050c1b9653e76412eb83a5c2ea9b94cd4d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZMEN2352775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc740aea555bc1dbaddc0f01c7acc7bebb71cadab0d9ea23100098183e30af467. 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/QZWFQ2395785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950e93197b010273be941a2c44e6831f69004daa7a569ec9dde442f1addd8a73. 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/QZK6Q2495025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0975222314cfd26188fb5c71c038d370edab1edcf5346f0372a12296d82b88a0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTBF2415480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a566316c0a981a95800947fbc5ed863a4c179b70ebf57a0f1aed1d2bb1c0ea6. 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/QZTBF2415481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b560de98c07953a9377333240ce73b7cb5cdf7d31a518cce922e84e2e598937. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZWFS2506044.
Las Sevillanas Más Cantadas y Bailadas de la Historia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2af00804a20dbc9fdf4888d1d24e4e252211c4188222b50653de5e19c09a3ff. 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/ES5301662640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a7155c54845cbae0860f70fbe778884688e73b2dea85f7ccac4fd3d941cb42. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ES5301662444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab54b1c0b12e347d865a595953e478b70c06956efc78b58687530ff59cf05a2. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ES5301662445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a94ac06ef56372fc0c4e7557cb45cdb34d782e6cdd4f4c660f1d2df028d9296. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ES5301662448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaead540b39f71a793e74c52f8685785366f405e1a1c73e1a318e760ea88308de. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES5301662449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02557ec0fefb3836926699e582b4db3265a47189d2677719cd49863d8fb01819. 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/ES5301662452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a51ec6b191e0c6cfe93cc4e8de0827ec79fffc581ceef14a37f2d4256ff8e4. 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/ES5301662453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e1ebdf6cb4e0dc215129f84507b95273cc3ac9430177bf2e71e8f3918156cc. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ES5301662455.