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 0x02176e0627b54a8c68c02202118240ce3823e87f65f6b7d1ab90c02153847e56. 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/6937b5f0-c86b-4d36-9f03-93380832ff6f.json and https://artists.proofprofile.net/proofs/artist/6937b5f0-c86b-4d36-9f03-93380832ff6f.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 0x8bfa509d1ac07dc0c663e59cdb904efaf760dd6ec1d35d9836f44c307e4a4561. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ARF061301598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633d4818351631a25cba4925f94375d2071f8ed2ae0d0de2e4df2cbb9f5ed178. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:51:57Z), 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/ARF061301599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d87e16f16c21d0dac5b22c4c5a155980a00fa403d9da21c4b2463d061c928. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ARF061301602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8eee0b79fa3a967a47d26a8a3bd3a8d9130c229547bd8a0bcd082d638a44bf. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ARF061301604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d8f050a233e8d27c886cab471fc50d3470e42a02ed9c147d52b7c217325f1c. 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/ARF061301606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488733366170bb82dc6acc5bbfb2388180ab1e4f59458d1e523a866396ad9fc0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/ARF061301607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d0a4b1110fb2163fd26aec9e2abd8d43ea7ad9bef329a12bfc7842c8264f63. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ARF061301609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb5202f54306d88a2dffbc0faf634258d5e6582209acb53367b5aea3c8b7cb8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ES71G1865736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4263b34f448bfcf82802409dddc4d04898aa6acd12b11a013585402b8312220a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES71G1865737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c4cfe5521ae4242ec1fbaf39f9ca07f0cff08e645b34a60559c0034bf8f14a. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/ES71G1865738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b684199b939e30b90e703c6089bd2f8102e179713942ca5a23856cd42e6fcb. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ES71G1865740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598e84ba36ce35a033c4ec300e100f1b1a7e875baca16a4df4febde86a88076a. 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/ES71G1865742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071902e53fde025ac2631d9036ace64fd66d1457cea3c648da096ace973fbb22. 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/ES71G1865749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aebfa0affb52783dd727e79a7f55e62f3ea44a7d397c1343a086e4b0f8c933. 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/QZHZ32088612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7142983a155eae247a097dad298266e77a8690ce8fc20978db91ac1604c00e4d. 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/QZHZ32088613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bec3c3e725b5cb249be4725b0df9a452a4837cfb47bb0a24c573a7cf08fc20f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHZ32088618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e3ae78aec0e38dcf66fe0dcb1c5b6f00dbaefc048c3d9a93ae05c8c56186de. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/QZHZ32088625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbe2253bb6d97acd13e83e3a62a2ccc8d410d91e0e6251a08800d480ed7e36b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:08:25Z), 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/QZGLS2038232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3948e40d04556015fe6580c4193d839a5a2632fd79f9fbc206339930b26d8f67. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLS2038236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eaa1602a90343739640893fbe2068d861dbfdff78c56094dd5cdaa0dca3ba4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZGLS2038245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ffae6ecce4c500ce1b4f7eb09614e1ac218c5f2adf2f97d25b3da5efa5b255. 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/QZGLS2038246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cc55f8613d5266671a5541dd44f42882409a46c245db175ee6e274e43ffd7f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZGLS2038249.
Cuecas – En memoria de Nelson Ñanculef Manquepán