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 0x8a2837897ab14f4dc76229f7582f16edd2e07951c6bfde0eb99e56250d70aedb. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/def8c3c6-ab63-4084-ab62-11cf3dc2aad1.json and https://artists.proofprofile.net/proofs/artist/def8c3c6-ab63-4084-ab62-11cf3dc2aad1.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 0xbc6cf866fd319409200724de5af6721d1e92e07b1308cf8aea4196f178ef0c10. 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/SEBFO7013080.
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 0x9ee4f4eef5e0f93017cbbcb8e2c65a5a5042137e124ce9181cc8fe577bb0596f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/SEBFO7013040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8f43372c2bf3503af34672257a2c2938ec4114e47f1534a619d3c87f23f22f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEBFO7013050.
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 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/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 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/SEBFO7013090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640b705b086c5e291141b8658148ed92cbc4fd047f84ba259f1d22fc67b335b2. 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/SEBFO7013100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97346268c500d1caf987cffa96afe3c89b7e4863e546c453902be376e2011134. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SEBFO7013110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357dcd882f5398dc2ac6b91409d6f3251a05da65504d809239ce0fc93b6624de. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SEBFO7013120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c3e2d90cab08ed7c8adba3532bc007f29eebd4a2aaadd79e26a90b00996b53. 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/SEBFO7013130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014cc401850e828e5d5a5dce5c6e8b599a3d27ce9af975744ce9ce1da95f9163. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/SEBFO7013140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f8c410071b42565f379fd328d616574327ce84b03ff5d58ba28b5f737fcd6a. 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/SEBFO7013150.
Polska från Rättvik efter Minu Lars Olsson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57d695a30cdcc2db3a835eca3e1271741eec2c784bfd51bea49bcbaf733bfe. 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/SEBFO7013160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffa7b669a2727e43aec8ae4d0ed3e20703fa6a0275b45703f3fc1c50ad36564. 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/SEBFO7013170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed04ca7c8085d4d0d1aaa84d5fd5ecc8fe55bb793473ca8fc8fd60050fb8b8d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEBFO7013180.