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 0x3c699004d810b7cc6bd28b7f26fae1156de69abec145ecbe04cdc48bc305d63e. 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/70ed4ce5-ef93-4bfd-ad33-c637fe257e72.json and https://artists.proofprofile.net/proofs/artist/70ed4ce5-ef93-4bfd-ad33-c637fe257e72.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 0xb5549396a48d70b629d4cff0642da7d44e81ff24c59b23342debeb558b7f3244. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES5018977008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba59f487bfe4e23cd5860ad1f89aafc9a8f20bc89af51cf3e51f9fde997818. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ES5018977009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6961d2cd8b587c14890414f1baf9d1e5e69c3dbd4cf85b786c027436f5d91c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:18:42Z), 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/DEA890300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610316ce803c4a143ada26df65ec6b0e0f8cd57088862719c7a8ddfe100b71a4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEA890400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe655ec6180d3ebefd1620402807ba60ac6a829c9d025d9ba7bfa05a65c2fa976. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEA890400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db0d4b9d765fa489968cb47ea6e7183947a6b04ebce8bfd6f95c22788c946e2. 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/DEA890400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc49de8d46024f2233383354f1e57ac98cc6d876d95c690df986c3f3a135ce1e. 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/DEA891200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbfd72cf86b52de3088dd4f55d693e891cd166bc2137b24c61f0350ab18ef66. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DEA891200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc945a4ccba8ca5520ae01402f4087e035aedebf6422299963d9298a927753891. 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/DEA891200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05ab25ae5ac18009e35c8fccee0fa352dcacc6bdc158a40d3a6ce3e4ce38dae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEA891600200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17421928a21197fd7f129fdfb0cb3a02884108eef29be85b4386804ef49bd9c. 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/DEA891600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cf57031c065f8a294278b08576cfa9984fc32812e1b8678ad8f276436f05ce. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:49Z), 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/DEA891600203.
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 0xa065862df29a6ac5fe0736d6c339ae1f96fdadceea3eb010e81d771d982c9739. 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/DEA891600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a67d719405f694f72eabb83ee7399a541067968703d8055b5ff95cdab88bd00. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEA891600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd0678b235be14094ed8876835ff156cf43c75acdcc7201f906d8ce684afb9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEA891600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832093482506d5367ca8d9ab90a78f0bd2dcd0364e75d869e531da6cb04e4fdd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEA891600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1854eb9416fabe8135ec7d3f3c7782e40a6d9afcafe5364f2130108df20d2886. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/DEA891600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297249851206649b81827423fe6b45941d0462a40aa6ba10f220dfe55127805c. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEA891600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df8b059480f2c6b8f350329a8fdcfb8cf2228905b7aeb74374a44dc305322fe. 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/ES5120400809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11853ba4b19a834b33e8561abe11eff77da6bad33402b7c47bd64edab790f1e7. 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/ES5120400811.
Concierto nº 1 Guitarra Flamenca: La Perla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717f168d098c872a6dbde0de51cd4d71a07ff9cf9f46a47a65e91e6b6f45dd0a. 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/ES6102423206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e95dd21f9f09159333c55db4bb11c02156f56d739b1803d6f026bfcc58428f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X2094954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb354dd87e69565af652478698776d07c094ffce49dd02127212fe101919abadf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES5120000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403cb413ae7ffeced69c42bd31a2f7f8aea1772975ee7c96836250532a7714b2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES5120200641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb8d63a32de6a687f01388ec213cfa0e630a452fdf2bc0171ea80b26bf3b16b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USUS10910092.