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 0x8550c7508f75f1e6c59a7ef309f2886a2395cb9f6cb2892b6f5a76c2d38b904e. 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/f4350427-7296-4a2d-b5a0-082e8acd684a.json and https://artists.proofprofile.net/proofs/artist/f4350427-7296-4a2d-b5a0-082e8acd684a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Clásicos Populares Gregorianos: Argentina
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 0xa5a42f440e72f770d66117baa607c03d9465df3ea41e2434c77aef03c05a0538. 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/CLEN21400977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efceb6dbea1210a2b85e13557457091e9692c2d190a71727b12d2c9106d836e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CLEN21400978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1f1fbefd0eaa6134ec92c2f65e03a99ff32e9af0eab853cc5ce21f11952358. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CLEN21400979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecca3b07fc402c0a7a8d50f4a9f8c168af2d94ff770c1420c75c3f75a0dbd69d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CLEN21400980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d1aaabb92168184bf738db6cd71b4b0d1303ec3d34b3ede5734f56ab3470bc. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CLEN21400981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0185f3b0758ce3112eb2391b39b3f2e7c9d560cec63f290236815e1567428606. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CLEN21400982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d223920b866ea709920f564e29605463e05f08a1716d2a8efb17dccc24104f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CLEN21400984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422aba9a07d78b438967287397296ae9762b42c99f4860b345eb1a4376f092a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CLEN21400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57031d7ec2786108738ad526ed21a60c71d7c1b48231825ae8f7cfc0eacf5a3b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CLEN21400986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad9edfd299971e3de0fa29b7f28355f7dec26c5fc2dd2c16ebc0daa73eb131a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CLEN21400987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbfc78cc29c040c4480c72f519f7a093de0bf77237611bb1c1cc9c6b82898b5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CLEN21400988.
Clásicos Populares Gregorianos: Internacional
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16532866859ea778f1856baffdc47c0e75d6a20a9f4a9dc6499ec399f6609ad2. 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/CLEN21400953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefceb537c3f5a8c4895a754ad3f5d4e4745896eb2ada90a530f56300094f7a7d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CLEN21400954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83be97a3bb598421fae13cc421ea29635aa7482d8608d79f5551771e584eaba9. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CLEN21400955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8dfd63199705ed2eb19c14794bbd1a353562ef4ad26a0bbbf585f6dc077ca. 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/CLEN21400956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a11ef58d3a3adec8b851835eeaa9844ba5345e8aee25ab86c4b60db1eba1ef2. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CLEN21400957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b747d4f94a43ce0000c8977593e211991e4f85100e5bdfa36f9da0891942a8d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/CLEN21400958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9021afe74bbfe2558d3c8061b3dd1b1ee978c8a12153909bb55f5defb35dac. 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/CLEN21400959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea91ed7dd6820f4e6f1f72a73b90938c2dcecb1e81c9a7c402ebc94addec35. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CLEN21400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b126f4f38e9c39880b67c7467e9ca4828b818fd76f29c4a0ce5999e94b42775. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CLEN21400961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaddabcf4a01b5c4a5f3dd6ca45939dec8f1751ae3d9389922ca65a7cc51069c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CLEN21400962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe56320e5d845cfd5c7e9635f2ad29ced7cd7f06a3bdbd3cdda1aec6a73583d. 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/CLEN21400963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49a882a152c7ee2fc478a73f2b0deb8fb47c2c9be65baa6bf7562f3b2fb5b94. 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/CLEN21400964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3edbfbe28fb73dc9e94170f9c5af92ab899c909f87529b7905b1caec38988b. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/CLEN21400990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c508f2156740b3762cd5baf3f08f956024d8058eec60584b6c9f0ab68cf6f. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/CLEN21400992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce867371cb4ffe07cabb5c03927ec9e6231bd3dffa6c9ff3d3418e97eeedaf0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CLEN21400997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00045e4d40743258f21e20257e5214294e63401dc297431d46ffbe3b194aa6c3. 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/CLEN21401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46664ee9856d7026e81d92f54e24f75cb762eef27f19f9459739b0bf5c7204eb. 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/CLEN21401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353da02ccac4ea354245a0656a03ccf7b07a035ac25395b4212e9f582568824f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CLEN21401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d02e973c220b8b13d8e8cb6e594b63770dce8e2454972578b15a9edb365a72. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CLEN21401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5439d4f067ffc811391b84485ae54a7f5b10736193a27a3865781866f7da4f2. 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/CLEN21401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f8d31db1537e3e848b821b4f0f3e9a50e1b46d577cc07ca2290752008195c5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CLEN21401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ec22880bcf21ca61914e5d4bfdb41915a79069eeb6e987db40589f3d90dad. 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/CLEN21401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e7d56c180ab638ebe6b313f530c757774dbacfb027cb27ad73524a6ed11249. 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/CLEN21401008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bf63b842136e62ddbaf04de81dab9232402e905d9dcccd3d785f29150b06de. 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/CLEN21401009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f42c88320bf69694e4bca608d0165e65fc9177d90213b74b201e80ef8c3b3d4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CLEN21401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c5ca7c0e5ba5a47216df734812cc6b598a52e2dcc2addf44a94b826dda664. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CLEN21401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaba7820d0a3c7c6186927c92ba854538ee1fbc63ffc2e86b5e859b1ca2347f6. 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/QM4TX2367078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c490be69764e420b2d667cda283e9bde1dcc16264fc7fcf3b76e707b178018b. 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/QM4TX2367081.