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 0x6d5623382cbe930448e5fb89faed67c040ddb8ceb64b21a50369ea09d1a6683d. 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/4cfb478e-7d78-44f6-a94a-29bf3581e9c7.json and https://artists.proofprofile.net/proofs/artist/4cfb478e-7d78-44f6-a94a-29bf3581e9c7.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 0x90342e8039a2e68d1d55cf3c7a730954dba7b06e3341de633469d581b5baa914. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:29Z), 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/ES5028300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc071fa86f8fa90e78fa76c1c3e4ccb0a4338a403d6a817d221a86c0190fb072f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5028300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb8018062a54e3bf3f7ed800112f2dacfb83dd24c995bb4f39db8414efe6c13. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:58:04Z), 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/ES5028300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e63a7bf80138c248616c1490266be17ec81729d61fecc6f283e36ef4d2f9b57. 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/ES5028500160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ad247adc5d7ac415ceab40791febd414ecca54cfafc76b0fcef7978eb4d69c. 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/ES5028500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc5db70d27aae5809da29ea3dafa4332cba559a2d0c61592d7f3e866618cbe0. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ES5028500164.
Cuando Cantas, Cuando Ríes, Cuando Lloras
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a33899f33b045c797737ba45143391583141e3764b27c3975a07d13baab4b0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES5028600239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cb13dc1b83b3c2683e6bf8365f45a078de5284ea58a3c06ac210e8c48698c3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:39:33Z), 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/ES5028600246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c296316c0153c33dc68788997ac80fbe6e6431c35e38887f0719a779001667. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES5028700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7d07d3efb872f5c105ea1b9dc844f272d843b9c23227e66ebb9bebb9457ee6. 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/ES5028300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3de5772b0b677d1c082ef49172621bd0418a5b4e579fe3067ef820edeed7d37. 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/ES5028500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb4d462edebf7981a8a74ebe7d7917e629775b00e9772e195bbb02699ba9e01. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5028500168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e3b4bcd92256d9c5a7292d863e81f13ed44549826b4b1373dd876cd79cb46a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:46Z), 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/ES5028300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b4d664117ffbd724e700ded7f59d4fced604ea4ec10d1a959bfd9e6991290. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES5028600238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2b019245117b32215a09d95dcf20966fef136ff7abb723d65d8f052df5ecb1. 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/ES5028500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e3b4bcd92256d9c5a7292d863e81f13ed44549826b4b1373dd876cd79cb46a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES5028300106.
Latino! Grandes Éxitos - Juan Luis Guerra / Karen Records
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f2c4b998603da5b2fc626217b9d31e09a52f2eef287e78ab150b9bced2866. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USJ3V1498106.