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 0x8720a56c817833b9b867e6d5609f58f5c2f0ef8262aed437aa9ae5bab049be44. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/795b5e97-5720-4f6a-b5d7-de20a71d2045.json and https://artists.proofprofile.net/proofs/artist/795b5e97-5720-4f6a-b5d7-de20a71d2045.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 0x5ce6e53da13f9033cf9211a3d63266e5dd6cf49b82a53d5eb05f0feeaeb92951. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAAW1144491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aec986a0a16b10ca93c18ea0448fac75ba3a189f970b6655d91fbaf9ac8dd9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAAW1144493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf7b5290bebac1709d6e844300145c8f0309690a26877f5513f7230273991f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAAW1144495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e47caa0537271539ad1046ef7020f34bbd1100a9ead77c1f253069fdee13fe. 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/TCAAW1144497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd372012990f1007b619ce18e12fabe2407db154abdbfdf552905ce81f972b271. 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/TCAAW1144498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271f86b0c4abd832f1f9ed1dbad891b46a841b3100677ce2aa04998fced17a64. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAAW1144500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa6e0b55f9c66a54ec00f5987fe62e549f13d8fc5b8170737b5fcf1038e3420. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAAW1144501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b0a6e5e031cf459fdd14a0cac692105d22caa19f8a4b97ae7edb99eeb14e76. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAAW1144503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220069048d4f5fb2b67a914be14cbe4120beb038987ce426d46fd9744a07248f. 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/TCAAW1144513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2604b584dbddc41dde1ee5195f503500719cbac1740cc05bfcacc687920bfa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAAW1144516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e61bb5ebdaf20ecdff067eaee3f89e3d57bf67b76913d0f5201b06b05f3799. 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/TCAAW1144519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5083309404f46ed6d7e76a27c605b952ee89e7eb7cc127b5b167ca74c2a4df. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAAW1144522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b28908d281c96a3287475975b1d67aefdf339446a8000ab2e3ff577281e4c5e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAAW1144528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277ba1c911933dc1b8af9cad8fbca1e6bf69d444d60d227fdb99df93c6813b84. 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/TCAAW1144532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4989c54a54caece3fd6ccd1bae1445acc6f91de8d26fc7a6a8a8b1ceb2e10ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAAW1144533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9377e7cb0365446256926d7acd31310687ccbb40b81f332e0213b8d40a9703. 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/TCAAW1144535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5712c0c0be3d48a1ddcd0dcf43cf58f9b2be659f7e414eb23044020da62100ce. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USDX41100001.
The Constantly Pulsing Universe Inside Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7093c8316403355abcdb0cb3f90aaf733e0862e387d94da0766df799f10083. 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/USDX41100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeaec0fe4d34872c26edb5e0f63af30d13b50f26ba83c57b8bf5f1ccc67ac6a. 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/USDX41100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057a18163d388fcff2a0c4b2deeeea32bd2a2441ff07e001fe52475c521437e1. 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/USDX41100006.
While Trying to Get Used to Your Absence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e7a83ba053d0429b80d6c1fb9de49641773f713bc6ff2b5a4bbeadfd8a1e53. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USDX41100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660009e4c47b413ad5ea2d9b8ff747754a5d2b6b882511e27a8895289fe21eaf. 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/USDX41100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995199273a219f6c8581f523993cb9a3cc7f16029ace798b6a1563cab3f79431. 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/USDX41100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2d0d2132c0b7d40e8ab60d44548a39d382b3630cdc39d4dbc3a3d5d89a05a1. 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/USCGJ0554425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fae1914a319962802281041e26869f8b2f7fa20700e3767aad15f6356ecf7e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCGJ0554426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70686d4d620b7838d3bd5637931287f4cac8a103434fa2e39225a4c3b585ba1. 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/USCGJ0554427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ba1e249a54db70f98ff466cea0b0f55cba8b967176e5636d0034fb66727377. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USCGJ0554428.
Claro de Luna (the "Moonlight Sonata" Tango)