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 0xa168615add05ece6d580f53c69a40358724b32b6b708a04d3039b5f81befb7c9. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/204bfcd8-00c4-436d-a6a3-c1389effb816.json and https://artists.proofprofile.net/proofs/artist/204bfcd8-00c4-436d-a6a3-c1389effb816.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vårkonsert med Stockholms studentsångare
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 0xaf57e2138bc855342a22c2e927da1018ba9f989581e1c25252d9695691673635. 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/SEAZC9205190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaed8aeaead041aae424aa5e877ecbb8da155f8502611c073d9c3a3116c3becf. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/SEAZC9205210.
Julkonsert med Stockholms Studentsångare
Stockholms studentsångare sjunger under Einar Ralf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf44bcb9d02f57fa7dc0bd95273d993df0cc1c24be34ac5bb89755de0b579f86. 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/SEBAA1202802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9a92a4d895b79e7e17a5c1e650cf70037f260bd3de11601b0df4e1daaec078. 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/SEBAA1202803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b10c47099bb3a2f922fbb039fd217f554041fd869be9f26ff0383513ecf50a. 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/SEBAA1202808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ebee7f822e090c95fe07a079693a5fad307b425d179bf36f468c077a052053. 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/SEBAA1202809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377fd626f49ae4c93586f53723cfd03a24e65c785d51f3bfe070bb238e1b0161. 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/SEBAA1202810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12c30e89caa988dd1204a573f2f9c5e01565d009dd1deb6b5fcf6dfb6990d72. 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/SEBAA1202812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb83a86388d57adad05ac31f147ee80f5c59e55f1945cc9534baca8d799e7d44. 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/SEBAA1202814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bbab47228ca79c877ed2755abf377c0661528f915de197792538205b41bd76. 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/SEBAA1202815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c4edcc4dc14da5c389181b993c5bb98262bb1b9e222ce6cc44c48cc242593. 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/SEBAA1202817.
6 Partsongs, Op. 18: No. 1, Sortunut ääni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dac87191fa5fc98c5c5dcb3de31a9fd5e315847f5c38068d1b13ffc0c1a6d08. 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/SEBAA1202819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237aa4ff94b76d1362f8ba782d0a7eb3e0f38e201f416fb071ca1e4a6d0e27a7. 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/SEBAA1202820.
Bacchi Orden: No. 10. Klinga nu med klarinetter
Domaredansen Nu vilja vi begynna en domaredans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126abb11dc070dd2e3172d9b5c19c997a58826e9ecefabf53340a3e9816d2930. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEBAA1202813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28da2d9ea239f4dcb94f9cb472c92395e7f43774a03f49139bffc1221892c0bc. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/SEBAA1202816.
6 Partsongs Op. 18: No. 1. Sortunut aani
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a0735809b311dd18bb3faf4414673cbc4532668998aa720bdabe33835c8d57. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE5E71800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da91406cd54298d9e46e18113ed00eb3d4b3311f5680061b14c64247791ef58. 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/SE5E71800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee0a236c71fe435cf08b98112293423b743a7faea6d486da15e36e28c3f4c7a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE5E71800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca19b34768803a9f621706c8d0087dd150be80785d124fd8298719cbb3bfb0bb. 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/SE5E71800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162a934a32da335299dbf729116d1eac1daecca5dc202b23ad09277ea6fee6a8. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SE5E71800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ea6761f19c1d98ce8e1b86c322d6a77c3ec511f9a4809aef4338c18f3fa9e3. 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/SE5E71800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26967e3d23cd7419574bf20c5bc1516bfe366c3f577ddedb677226bae53f0f99. 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/SE5E71800113.