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 0xd79957fe19772d67fcb160a6f4c86e8f5138630ce0a80ec01b67a9741b0a3369. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e498c86f-bb27-4b45-871e-fda827978e72.json and https://artists.proofprofile.net/proofs/artist/e498c86f-bb27-4b45-871e-fda827978e72.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 0xe41caad27bcb75bdb44168bde3895205b50f0a3e1dc25ec227a3b8653fb2c20b. 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/QM4TW2262308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69a70debad6e2d8a135e7311bcc06883d9e38525b7487fcfc31fc8372257ff3. 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/QM4TW2262299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d0356580ec4da91f769de6ea449a36153274649271628501f1fbbc4b157573. 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/QM4TW2262300.
Nesem vam noviny - Arr. for soprano and organ by Ola Höglund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461757ab2a81b1ceee9ef2e31a23ed9c6759933ce7dfa21fce9199f49c24d655. 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/QM4TW2262301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dfd4ed83ff275368ee40a0237b229c70962ebb2b536c25502da4dd4c969780. 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/QM4TW2262302.
Es hatte sich eröffnet - Arr. for soprano and organ by Torsten Holmberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cce747f5e3dd54240030570424110cbfef14db8e6621d3052af32557239d374. 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/QM4TW2262303.
Lulajze Jezuniu - Arr. for soprano and organ by Kristina Stobæus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727536a66e1bf18420cd341706a4d547a01f3eb1883a11e2fcfe676edb7fd2ba. 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/QM4TW2262304.
So sorry - Arr. for soprano and organ by Ola Höglund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb05e075b7953ffef5d674fdb896b02b66a4a417efda09fb96eead240b575249. 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/QM4TW2262307.
Let Us Break Bread Together - Arr. for soprano and organ by Ola Höglund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da335339b38bd36ec4261f968b9e51a9b628c0ad0de03cd999a0b16a83db11d. 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/QM4TW2262309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34915f466d3126a1b0c28eba9fba0b5b66694b0ff8bed6b248dfa837b833fb28. 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/QM4TW2262310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc415fc33d03dc975e85960791ff487f1203e4ec3a026d223b01234830cbe91c6. 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/QM4TW2262311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55f2a669392cf0c1a2fb48affa1117e81e1537ed2f1c5a1813639221176b886. 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/QM4TW2262312.
Ballade de Jésus-Christ - Arr. for soprano and organ by Kristina Stobæus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb06306cefbffc24cb5740582f262bde2308b5c66b3399a12f81e7ffa8ac59a. 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/QM4TW2262314.
Änglasången (O vad sällhet) - Arr. for soprano and organ by Ola Höglund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e25e0f0d21ed0f78b4efa4835aadfa430c3f7eff2f769e826c9b1222f26575. 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/QM4TW2262315.
I himmelen, i himmelen - Arr. for soprano and organ by Knut Nystedt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cecda7dcac9e35ffe71949eaa3f8a29b8df5e67efe92ccd3bf437c2033471af. 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/QM4TW2262318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4384c345d1465ef6f8d3e428dc35e6e10de31e734fe410a38ab42cf55b3d0f61. 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/QMFME2249790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f7aa9de2fd81389cb6bb910346300116286afc5b208fa524e630a26bf87f1d. 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/QMFME2249791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7417991658aedde0972dfc186c081bc6ed923ba6d96a1d49b901dd62cc19c65. 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/QMFME2249792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6d9f412356f2a70d0726c0016f6e7fbfe58143a75034b97023a64082974d64. 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/QMFME2249794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725b607088277c5d471b182401d2514d5f96d8b9a4b65e6b5d7c9cb9edb349c5. 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/QMFME2249795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e21a8cccd5d85da4c90d63435cc23673441943406c5f1f1dd2655f13da89272. 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/QMFME2249796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31ca4d72f6afc5ec2ac0e11efa8323d0881b32cd7c35f1c98cfdc8884613afc. 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/QMFME2249797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca2f7e77afd35c54c4cc88634c335a5510a2becac804583628e6651570c4591. 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/QMFME2249798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ced801169f7e9013ccfddefe8812d6664d9dc42bdbb9c4676a215f3269860a8. 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/QMFME2249800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcf7b5e82a8d7e7258caba4a34278f658f29539f79ba5c0256b366c749e742a. 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/QMFME2249801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ace0a980f5d130a638c52979a2004f7e7b18fd14cff8f469c1aab97cd6b98c6. 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/QMFME2249803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0530d115af16d3cab9f23f9774ba6977c0de64a8fe5579a6e10b7299b04866e8. 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/QMFME2249804.
Svensk lyrik serie 1 häfte 1 Op. 17: III. Titania
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b18fa4c82b6a3466cac5011990eb07ce58de7f35a647b43cdc1c0e8fd268268. 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/QMFME2249805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676f85f8743f57c86b147da0b10c849cadce1a36943189a5fbb10683d9b1cb25. 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/QMFME2249806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a5bc09d13acd8ab440a7091a6d80ead92709a8ac2b7ed0313a7dc16d80c4e9. 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/QMFME2249808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d1494a9d2a499ce7845dfd68573d82a9ff879848c6fe3c0f05ce40b1fa43d. 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/QMFME2249813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b890e3104c79bfbbcec0aec87fac092fd59921bd66a588338c19e8120a340e. 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/QMFME2249814.
Kom liljor och akvileja: Sånger från Gotland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0806efe998f769b4033d6d258d5e8b852e37b0088783a3c82d1648421e6c77. 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/USB8U1076228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d14b159491c087d2d32f48cc5cf2fb6fb6d604d65f99d227944361d3aaeacac. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USB8U1076241.