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 0x08a34d8c9fde6945a31f4231e02dc435e97057c92f145a682da6e7fb68281d7a. 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/042091f2-5ea8-4b11-981f-9e0a934f2634.json and https://artists.proofprofile.net/proofs/artist/042091f2-5ea8-4b11-981f-9e0a934f2634.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 0xdc6c11238fc7a32ddc4f502602a8a195b8df3ec43dcca3f60a8008f088a22f6b. 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/ES71G2305895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6c11238fc7a32ddc4f502602a8a195b8df3ec43dcca3f60a8008f088a22f6b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2305895.
Mix del Recuerdo (Te he prometido / Adoro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fbf243c66aa497dbc23143c75218a4695caa30c5f1f3990c0a1f9c1071d818. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES71G2315663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a50f56a5fcd7079030bbb89ee7ba43ded14252b09e2234f2fabc43b487e73e3. 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/ES71G2329590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372f9dd74ba32e88673c26bde3c1f1caae0baa816406102d4700563c184aa15f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES71G2329591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefd88d4b13b4082c0c13a92c0c9d6f2fb64377c8c3bb35499706e1bda72eb89. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES71G2329589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243e85a10892e7f8c1edcb2eec45f4e428f080e5084e580cde0df9322cd3e31b. 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/ES71G2329587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc0ab83cde1772408c430caef7cb70cf2dcdedc37d4bdc26ce96eb19eef7af9. 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/ES71G2329588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d12b0b1fe6388a50c09285cdf8de87588ae99a9697a2cb6081d97143560e67. 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/ES71G2329586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f3bb3f4225c543d9b1b8074a1c94a4c6202fbe7081c4dc7c445c8e6b76309b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/AUMEV2442076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd153663691f21d7eafe3850dacdc17e3aa2f425370c1b99ce9cb338986548df8. 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/AUMEV2473611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ad7b40875397fbea115a02f4e5b7287029ca995af9bb6c4702806bcc14ccc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AUGBT2494912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef8c062ca0333fbc2ca351354fab3ba913134bc5902b0a6ef3db1ffade65349. 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/AUMEV2507984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ee918adf0546139a2c22771b826b603b2ddb1a6b4955a6eb8ae7b5b2a7857b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2543391.