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 0xda5b669ddcd03f9fec4df675361070fd6143630102b012d6901eb48853dc339f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8313435-4f8e-4045-a51c-f8cb67669262.json and https://artists.proofprofile.net/proofs/artist/d8313435-4f8e-4045-a51c-f8cb67669262.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 0xe4143fd4ed4fc43bc9ad444549f51c1c18f56eba6d8b038f86bae229defb2a52. 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/SEBFO7013010.
Beväringsmarsch från Leksand efter Knis Karl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe427766817c43c4020786c61f1d173080e00eecbf13a1cc88efa69a2f45f7472. 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/SEBFO7013020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdaf85ae4c992d168b27007e3c1cf06f9df526fba08ee27934d48324d8db142. 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/SEBFO7013030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566d5e6dc5fb8c520c05a1263e31150f53fa4b4c63c99bbb7c01f25f809c5804. 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/SEBFO7013060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5131266d1fae46118d87a67204734fdb355b55fe121e9938a4d25ad210e85066. 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/SEBFO7013070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6cf866fd319409200724de5af6721d1e92e07b1308cf8aea4196f178ef0c10. 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/SEBFO7013080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f39baa8edf0738d716f1a5ccc83d1d70eda2cbc0c8671e1e28a1e2c5ee4ef99. 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/SEBFO7013090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640b705b086c5e291141b8658148ed92cbc4fd047f84ba259f1d22fc67b335b2. 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/SEBFO7013100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c3e2d90cab08ed7c8adba3532bc007f29eebd4a2aaadd79e26a90b00996b53. 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/SEBFO7013130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f8c410071b42565f379fd328d616574327ce84b03ff5d58ba28b5f737fcd6a. 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/SEBFO7013150.
Polska från Rättvik efter Minu Lars Olsson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57d695a30cdcc2db3a835eca3e1271741eec2c784bfd51bea49bcbaf733bfe. 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/SEBFO7013160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffa7b669a2727e43aec8ae4d0ed3e20703fa6a0275b45703f3fc1c50ad36564. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEBFO7013170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9cb8a2f307aadcb3788f0a00ca121c7b500a1125dbb725e875326109169666. 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/SEBFO7013200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6334928c90874f5f35d60ba67c321edb9f2e3db32c4fefd39ca2365f1d1645. 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/SE3SA2204407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73b3e7a890e1f2c195e9d078d11bd20ab5bf2090639a97290e481c51a41e67d. 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/SEBFO7015010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76075ae95fb9d757bf994782452d5f2b15ffee00c5777d459ade62f120602047. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEBFO7818010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb719da85ba38f40711e3c116c68a70795c7de3d2832189a167e3a173fd74fbe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEAZC9326040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf60f50e6956449c53efb663f0f48663ae31363ac9c67ecc37ced6e8ddc3e045. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:53:24Z), 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/SEBFO7917010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47d2a6ccace18779e45fcc7222a2bceed590e535a070be95b17492d323a3955. 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/SEBFO7307030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe15d8c174b917504adf092ac79be4a6fc162a6d26603615030385f78785dc0a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEBFO7307050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b362660b4733243f88c463d1bce8a1fb84025ed3412bd9448b9d1130aca3fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:01:18Z), 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/SEBFO7818020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef13489cff33861f3d6400c7b50772fce90f85711c6348d30f1a1816f0ac5a3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SEAZC9326010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98da2a33e1a6673db9f1f1f051b7b8516c381fc82f1e09852768bfcaf8637c0. 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/SEAZG7903010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6cf866fd319409200724de5af6721d1e92e07b1308cf8aea4196f178ef0c10. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SEBFO7013080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb007460f4b62f1073df12232917f06688cbc015f3d290b07193c952a36ec3b5d. 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/SEAYD8212020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931fcd77ca686710e7cdab3abb8d4b909346dfc4dcf6551b841a91eef7ede520. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEBFO7008010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b63cb144ab8196c34a41dc387306990a78c53466503dab8c8d7d95738c9fb8. 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/SEANF8400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43420e9ca290a132887c36fb33458e3ee16139eb275b3b54b514c2d6562f925a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEANF8400304.
Getingen - Polska från Ore efter Hans Dalfors
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e3c2268c56329d720834a38d67cb924c0767e674944c90821d8442a7f4e7ce. 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/SEBFO0110010.
Blågeten - Polska från Ore efter Hans Dalfors
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ab70bde1709fff334434f971bfe6f05f063dd039babcd13bc85c29abab1b2. 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/SEBFO0110050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60194b311c5845846686faa09e77389c6292e33d49c62d5d3308a51e7b414920. 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/SEBFO0110070.
Mikaelidagen - Låt från Rättvik efter Blank Anders
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bd06cafafa8a05d74cd237532d7c378e5b16a5a18686dd22c1ac5a6dc440a9. 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/SEBFO0110080.
Fröken Agnes / Tretusen man från dalorten sprang... - Låt och polska från Boda efter Fräs Erik Andersson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747f5f3e0401c06f1c62c78ec6f846c3dab2db11c3613db1a0b0bdd2069d8c88. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEBFO0110100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1ffb0ee66cd57a678cdbcafa21d3815d7781a04b54a9d96c8e0af6fb7cb0ac. 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/SEBFO0109010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a53e74306f2adb3c73c245c0bf8560a5241184cad880bbe8735bdd31370c763. 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/SEBFO0109030.
Leksands skänklåt efter Knis Karl Aronsson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422ff450accb1b055ad48c6dd6a5dc5a3f4385e1817a499fc697bab922c45d1c. 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/SEBFO0109050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6296ff2ef1ed84fd90bf0f0ca514a2550390fddedfef8057f30636d4ba98c52c. 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/SEBFO0109130.
Långt jässpôd på bârgom efter Pers Erik Olsson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f5cc5c19b64ac07ceed8c4d6889e9546fb5b314b3c557dc1a3305dce30604b. 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/SEBFO0109140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec95ec3b62938b590eaea642ebc56c7771589638645eff4526a5c3351f4c4c8. 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/SEBFO6714070.
The Swedish Fiddlers: Music from the Gathering of the Fiddlers at Delsbo