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 0xe482695fb0865e9b146537b72bd6cfb35925ba7a1454471933b79f26c6fd17e1. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82d7f6a7-0b4b-4638-9d8f-3690e3469a3a.json and https://artists.proofprofile.net/proofs/artist/82d7f6a7-0b4b-4638-9d8f-3690e3469a3a.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 0x5e21aaf53161012a457b95c137f7d1e7cd6111bbc73a65e759661c5e85c334aa. 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/NOEHX2315010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0783bf9c6e8470132783857a891f130da39cd27c3e3379d47426a9d46a280b. 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/NOEHX2315040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ab9e3e6c98ca1c511b89359eacc65b1284b8624d5742cba9475b55995b4018. 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/NOEHX2315050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae838ecf6cda613940cc3850a330ee6810c812edabc98698b5bda7e934f4ac14. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOEHX2315060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5a59089d2866bfe2fb4d58467e5de31d5b40daa7e6301dc2b73b2dd0ab162c. 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/NOEHX2315100.
There Is A Place (Arr. for Choir by Kjetil Bjerkestrand)
Hem'att tel jul (Arr. for Choir by Kjetil Bjerkestrand)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c35966c65728d9fdc6df40990e8fd84139ddb6137d3ce4629e1fcb3467026e. 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/NO2J82305080.
Nordnorsk julesalme (Arr. for Choir by Magnus Klokk Fremstad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3b47974fa54b203d27d6371a3fbedaf16c12cbddc234b8b2b8c55fbc215f61. 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/NO2J82305130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc5555a8fc4ef28c170970b930c8bfa7d330139591d056e6aceebc30599ead0. 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/NO2J81902010.
Vøtranotte (arr. Idunn Vindspoll Arnesen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1135f7756b1b1a9cb7603c080be2e6f1afb4239c04f9ed7a6a4e1509712737. 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/NOEHX1803020.
I denna ljuva sommartid (arr. Kim Andre Arnesen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a6f198755b65de1f9f17f92120d8e9f8ed5718d83b12d40bdce5cb30d11ad8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOEHX1803060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815eb0a50ac3f9c823e03b7c9b0603ce7dbd7d0e71a9927e8dbf1cbee15a9f1b. 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/NOEHX1803080.
Kornet har sin vila (arr. Mette Østby Kamperhaug)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50a547ec15a1c53e6ac7e54a09f9f7e632f47c49120ed8f8a4699c7ae5ca680. 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/NOEHX1803090.
Bruremarsj (arr. Idunn Vindspoll Arnesen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6932139667e3750c1e048ca7502e937c23ac888fae6705d95c1953ab87a82506. 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/NOEHX1803100.
Som den gylne sol frembryter (arr. Henrik Ødegaard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf021532d7091d255cb36241c9fea0b717cba3b9934165bac2b2d6bdf4ed32ec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOEHX1803110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8a6e6456e31c51ff71504150b7699e29febe05c5e28c5b35e54b58f8e9c421. 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/NOEHX1803120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3682265315c60db9f17201bde124f497df14522b706e98e6d48b6cf99a1386. 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/NOEHX1803130.
Se, hvor klarner det nu opp på jorden (arr. Henrik Ødegaard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec79c0d2d59c19bd128976ed203e90448dbd3a0b2c6d04900a45434a9302b643. 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/NOEHX1803150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cbc1e639fd746c92e8738fa85929a91cb10adbea7ee6604410934544d1779e. 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/NOEHX2018020.
Her kjem me, dine arme smaa (Arr. Idunn Vindspoll)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a664c4d05e947f4750a99c3871190b24a5406e620eb8de4f98d902aa3ad5b75. 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/NOEHX2018060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99615e4a4b9a9451af1b6af427e921fa2a47cf9127ad04bedfe7effad927a4f5. 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/NOEHX2018070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87324d907ab7ee3451ab37efb65dcb72bc944895ef49e2db50b582f31f83568. 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/NOEHX2018080.
Vier Gesänge, Op. 17: Es tönt ein voller Harfenklang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6f2805d202f65e55c15bca8ac0bdea71abc479102888c0fb24c5d6b3abe1de. 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/NOEHX1314180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a664c4d05e947f4750a99c3871190b24a5406e620eb8de4f98d902aa3ad5b75. 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/NOEHX2018060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd0b48f9f18623f30f479fc1ad3668bbf6414de4fbf331bf6dc8442963fe93f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO2J81901010.