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 0x299176325ca0149a457d44d7239b2029f2df95f63144cc267e11d4dad98d8319. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f80ba59-a6bd-405b-a7d2-53a45b927ea2.json and https://artists.proofprofile.net/proofs/artist/2f80ba59-a6bd-405b-a7d2-53a45b927ea2.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 0x33481e34130768f910f452aa15b72b0a41f834e2cfd7310f99747df04b194175. 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/USB8U1027288.
En vacker dag: För mammornas skull (Maj-Gun, Margit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0c2a7cc523af3de1cdb54c7eef21f6adc2bd2ba6c1bc9ce28102885b5d4649. 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/USB8U1027289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7748b1fd663572fd77c4d7b1b45ba76804a1a86a3f6159969f0344e2ea728dc9. 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/USB8U1027290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428aec87afd168cec145ee42374127779502aa7ec5ba8320c5d27433c4edcef3. 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/USB8U1027291.
En vacker dag: Lita på mig (Maj-Gun, Karolina, Doris)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575f8e91629d196f8ae87ed4e1183430f74f51575b352b293042895165ba0c41. 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/USB8U1027292.
En vacker dag: Jag minns hennes händer (Karolina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b7565804358c5cc7123e2b419cc648a1856b78e96263dca59b4b866cb5b2e7. 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/USB8U1027293.
En vacker dag: Vi ska alltid ha varandra (Maj-Gun, Karolina, Doris)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a53d605a7c005f57a1fabd9a32c350d79db569d393c9302876c54b77593e195. 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/USB8U1027294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3786c99af4118309b48dbab405b0850f9846bda5552c52b2e0680789cce49b0. 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/USB8U1027295.
En vacker dag: En gång var du en del av mig (Margit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cfc8edaf515965304608c218856f1914974629b0e08463016c927b32078991. 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/USB8U1027296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd1055bd5183439fbd36796fd004547ae4b69ec6714dda79ffbf90f75adc01c. 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/USB8U1027297.
En vacker dag: Jag gav dem mitt allt (Margit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8388a7d06aeccc356cee43304c1a6840b45b6363c7a16f74d6a33d02247a3eed. 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/USB8U1027298.
En vacker dag: Kom hem igen (Sven, Rune)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1016b760cf1d40cc049c01592dd26d59517f6293b4651b89c950d769739386. 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/USB8U1027299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ef407e7878af2d4e8b36d9808f21cfd37528c375a01cac88f0378a030dcd3. 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/USB8U1027300.
En vacker dag: Vi gick över ängen (Karolina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa85467a8f3906a37f8917974a41e953eef0639b7f6664d2d9730486ea9794b7. 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/USB8U1027301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809c15fa51eb3690da10469b5faeafa73fbe795291e7fe97b584f9b03da88edc. 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/USB8U1027302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40813d5bccb56e7196d3c44ede2fc09f868d358af37eb37f21bc238ba90df457. 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/SEYOK2055688.