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 0xc27fb0b1e89f8ce358c4d3bdd36e345538dfc0cc0e0a3a7f77edad0de751541c. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09923c36-b032-412a-ad63-7d7ed16b1fba.json and https://artists.proofprofile.net/proofs/artist/09923c36-b032-412a-ad63-7d7ed16b1fba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carl Michael Bellman (1740-1795): Sånger och Epistlar / Songs and Epistles
Fredmans epistlar: No. 24. Kara syster mig nu lyster (arr. B.J. Lindh)
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 0x33b77de82f77b173d151de94fc26fe6b6dcd62e2b91c466fff99e327d84a8abb. 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/USB8U1041728.
Fredmans epistlar: No. 81. Mark hur var skugga (arr. B.J. Lindh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bfa5d48c9a876dba4e004d7b40218e69f6c1a25006920af7ca9c004b6c6e8c. 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/USB8U1041755.
William Clauson sjunger Carl Mikael Bellman
Fredmans epistlar: Nr 10: Systrar hören min musik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903643fa72302362f6ebc63f4189e5c06e86093fb22e8659d182a36c6343cde2. 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/SEVOZ1350501.
Fredmans epistlar: Nr 2: Nå skrufva fiolen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18da685b17ccbcc7fa8d8a5ee6ddce22206b2030d49b59de32ed993ddb1a2c8e. 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/SEVOZ1350502.
Fredmans sånger: Nr 38: En Potipharns hustru med sköna maner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9222da388861bb0d9282c0f4cfb82051c658f63a1069f83baf0a0fc33d4c3f. 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/SEVOZ1350503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf823dff6a868e4320fe69ae7da2c7655a321093d8a091436487452f2bc3fb80c. 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/SEVOZ1350504.
Fredmans sånger: Nr 16: Är jag född så vil jag lefva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc960b60c555dedb60e4c77f355d69175f7f3a3b0ed5ef9195eae12c345d8789. 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/SEVOZ1350505.
Fredmans sånger: Nr 10: Supa klockan över tolv
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c7a213df1f2e1561cff0f2d1ac8b62a506023f88f22afac74acf91ededadf2. 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/SEVOZ1350506.
Fredmans sånger: Nr 9: Nå ödmjukaste tjänare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753aa0fe0d05159400c4de368ef3bd5abf22177f07a5414dbc60b9c99588dae9. 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/SEVOZ1350507.
Fredmans epistlar: Nr 39: Storm och böljor tystna re'n
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f7b88a5a48f0df9015f714db0aecf312d6721d2bc7ebee93bc7234c486d8ba. 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/SEVOZ1350508.
Fredmans sånger: Nr 56: När jag har en plåt att dricka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6128dfc7538143236d4eb47e66b315b3ceddaad142c9eb43d6d9e0a58f345568. 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/SEVOZ1350509.
Fredmans epistlar: Nr 71: Ulla, min Ulla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d81df4ec0989ad681d9f8b7dac42094946ae3da8fe7b427a785c124a259e09. 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/SEVOZ1350510.
Fredmans sånger: Nr 64: Fjäriln vingad syns på Haga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a9d137903c4b65a0ac148cbc407b3643300586de217bfef8668b9956b553a3. 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/SEVOZ1350511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df379a9b896fc671b54149f5cdf9153ff3af32de2e2b284ba1ceb073a0d0e69. 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/SEVOZ1350512.
Bacchi Ordenskapitel XIV: Böljan sig mindre ror
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872f8262453f16a7844fa7c38572ec2b5382eefef9addead70e1d8074bbf5f58. 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/SEVOZ1350513.
Fredmans sånger: Nr 11: Portugal, Spanjen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd293bb6a58453899dd321a2208cbcc135a8f48f9ac4c4c4896f25818bb8fe87. 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/SEVOZ1350514.