Kupela (Zabale, Larrañaga Eta Berastegi)
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 0xc6fd9932e3c07ceaf831933a70021b4a2f9d653412c1f1c2030db83d0673b87c. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e207c483-55a1-45ca-84e7-42cdd7caac5f.json and https://artists.proofprofile.net/proofs/artist/e207c483-55a1-45ca-84e7-42cdd7caac5f.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 0xf1e0fe9380f71054e1d0083252542a85d4a38fe1451ca55c356e8924071d32b1. 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/ES5591200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a323b3bb26d4b8ad6cdfd6e1e6f662f2b684e080cf39f002e279ef63a35d7b5. 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/ES5591200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7892f02201964364c91d45a5fbc8db536a98859f34d24a26bb848111d99ebf. 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/ES5591200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3661986a6bd8274ca565b66ea04e796898368dbbd69fb03200505e2ab98f4f63. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5591200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a73ebad9751213c49272aa88f8c5520fabd1847524458dd8298f988178010f. 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/ES5591200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a6aacebeec2548306865509093f13efbade750aed5807e75ed7f9043bd8987. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5591200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311ababf2f6950c755b15fada0e2eb835ec3b364c0b9916ec99431fb14b38d51. 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/ES5591200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d3ad3cf4a6145a5264b7a0b935555ec20b6680c1a920dc29d5bcbe196c809. 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/ES5591200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3a4864beab11f7f8c38d8289b6cb6ceb392367e8d62f72330e2c1d771c1332. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:07:33Z), 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/ES5591200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a14f1bc5f076dc35d96d9446dc679e1ba9ce9d323aa2e3a385fcc30aa756ee. 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/ES5591200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe42f2de3a75d672e18171db7c8a385eebcbe80a0edf87651a4a1ec9a0b6b4fc. 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/ES5591200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c6d1c79f5b6d30fce5fb7f9ca5ac46f7c74e1b650fb0cc07596c602df066de. 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/ES5591200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4484930024f847ba3e41c8c7baf358550686bf34540385ae1dd73089fc7b8ab0. 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/ES5591200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5abdfc096eb3281d641f7d4d8d35b4b860cb683f4b5ad92146929038aac5e21. 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/ES5591200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b96876df86b3ed8126de3eeae4bfe41380f00fc25223b8b48fd6881468a82d. 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/ES5591000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f8ba8e68bfc1fae1cee1358c6083c197d232679cb9dd7e0251915d6d14882. 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/ES5591000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7deec4bbaa27376b0c11ba4d11414c57f5ef50855f8b9a212069b7f4fd4349. 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/ES5591000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebbd48e47ab4002f38518aeb6627fe7ce1992cec63cd26b7a82f688d1c747de. 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/ES5591000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3582a33b73cef940d7203434a7cbd6b158ac1d8c4df344d1fc992e449f238745. 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/ES5591000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8f759393704dbbfe3936a69b80e09af633189564da211210e5e05b81bbe457. 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/ES5591000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641a2c8d3692a0fa26b4b078b76579fdfdf148738466edf3d6b5782819de4d1d. 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/ES5591000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7390d0dea494097312a334cac8af4646660a851c09077508e2f729a2c3f853f3. 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/ES5591000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e1ed939e4c1d44d2564f1a93d31b87eec2280d139acda85f7241fa98f0fa37. 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/ES5591000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55a395191b714669be2734f2978218900683d545096c84e63d5bf588b05ac14. 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/ES5591000200.