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 0x28d8174a8951a0f2a3bb5f4815310ac666757feecbf247fa268adf2898ac9738. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5d2d3d6-0b4c-4175-a0f9-7d2b3f522f52.json and https://artists.proofprofile.net/proofs/artist/c5d2d3d6-0b4c-4175-a0f9-7d2b3f522f52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Barnesanger - De Viktige Bursdag Og Høytidssangene
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 0x5ee53e3a4191b47c258b7140ff658aec0af86c125301a466d69dbb98a9b5f28f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOX9X3456701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e97f401718e889917c3019879306b446309058c338f6b71041f56dd44066ee. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NOX9X3456702.
Hurra For Deg Som Fyller Ditt År (Instrumental Versjon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b9d9f42a9dc051e46419899373790af72d88c4cb0ab1411f59421dde848581. 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/NOX9X3456703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba156746d9676a3fbed55c9abafcc96e3421f00f87a6bf3713b7a96488552c8. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NOX9X3456704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd37fffa2c1b6da9cabb6f515cb96ba8174cc3d81ea5166883ad43bfa38a35c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NOX9X3456705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406c947d52236033694dac79d414455a39b5a87028d83c748f192002ecab2aef. 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/NOX9X3456706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93898c08527f7419efe2a2c31883a823f2d8475a7d9ff8df2c35310db0a27f6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NOX9X3456707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf588f1646159b9c02e474cff043774767401a1034f9b0607e6cb3e60f02c2799. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOX9X3456708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f64bbda38c55192144105f780f9497b0709a1e365ebdb56405affc43b890d50. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NOX9X3456709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e4d91b56473378016f6ebd2412fc688327d3162480b770657a9c7b66abe8a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOX9X3456710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459bd7fa038fce8a056e512516fee2f690ecb7a07865c5dd1eec6ef9ec922ef0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NOX9X3456711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb9e15b96615f24ab1069d00deb02d3b4b808ba9013b0dd97dfa3ed11815d29. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NOX9X3456712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6684c4c7fc9594f2e59562b6d9304aea476bb03cc09eaa6226a316883956570. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NOX9X3456713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b07f6f073af3d29174f210bae9628055ea7d652ba9e1a9c795f39eb74218278. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NOX9X3456714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8ad6349be95bdc97f226ee46f68d5c3426780c1f0d8a781b12cbf84267064e. 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/NOX9X3456715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeaf22fb4af3cc287d808b97ed5b5bb54411b20e73fe074b489f904a040c53d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NOX9X3456716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91cca8080ba5e709e8b09de2a498cf5a3a042f34270de8cb6f52575216f4db5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NOX9X3456717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714732fe81d5e8811aa25aec068772fd9df3a74191341f3d95231a2b117d8265. 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/NOX9X3456718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bf857e1b9f1cf88593337966554ceb335db9cf79a50b5b1f57e94914fe8d73. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NOX9X3456719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11332898cdd8cfab4e8a5eaa238e0a0d659cc97f04a6d45c11f0ae3deb1bf81b. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NOX9X3456720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe263f852c6a7915fb74ede65c74b219676e5c1b7487796fec2ec48d72cb711ae. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NOX9X3456320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687196d8ad03f2097eac2609f9662a3e0a76dc4d3471481dd8cc052b816b52c3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NOX9X3456302.