thumb|250px|right|David & the Citizens 2004 in Potsdam (Germany) David & the Citizens was a Swedish rock band formed in 1999 in Skåne. History The band was created in 1999 by the singer and songwrit
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 0xe358e9080fe2aed2f1348690b9a96cfa87894dc460e0b1bd6556d7d8c4f11c6a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83cb267c-2bda-46f2-8158-d433269b711c.json and https://artists.proofprofile.net/proofs/artist/83cb267c-2bda-46f2-8158-d433269b711c.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 0xffe8eebbafc9c82cdae2f0b2db6065a08c949ade39c11bc3190097216a13a0da. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SEVUE0301101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746e945bf5e2e9d33130411aff8b8b7ea7ad2cb86a93d5e56c8f5489caa9eeed. 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/SEVUE0301102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7851c67700194680cffdd0df5d5976aefda2af67c9e5fdd0e33aab747cd921. 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/SEVUE0301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a319bfd391893e462fd0a5e788aee9eb90b993bba898ce7c371cf3b2430ba63. 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/SEVUE0301104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310a5d9cbc777ccdfee79082fc072b0227bda5d662a5d871454565cf12cc7f99. 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/SEVUE0301108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa898f2b6c28e952197787de4a4d0123462cd70e6e3f4044fc1df5d0ed4dc7b42. 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/SEVUE0301105.
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 0xb0fbc3bafdb4f07574753616c31d7b7662e3e6376d6d228f6d91d84e81086235. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SEVUE0301106.
I've Been Floating Upstream Since We Parted
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2b1e653d44e01f5f4b116130766e2e9af5519b6b55b71d7bd3e5b6d917d037. 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/SEVUE0200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e5b411c635abeb991eb0e04760cc8883c7606d86eaa9da30f2717abfcd52f0. 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/SEVUE0200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1be2d14cb17ff3b2136ad9a7b27d5635e5fb1a7bbf26f774424d2fdd3e4e6d. 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/SEVUE0200106.
Now She Sleeps in a Box in the Good Soil of Denmark
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8864f5c8a9dd9d3a2c16c601392eb51b5f30a2d185efffdcf7d60f889a667d19. 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/SEVUE0200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c8b6ae76ced8d1dc2ba985d06928258677a0ba32cdf71cf27c68486b68a03c. 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/SEVUE0200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa74ab60458655a548d7f0f2961f6795f2d588958ed8cd919ec0d615ce54172. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEVUE0200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa3f3082003dc7ed04a094dfeb725750d35507a64ff521ae7b5e5e32cda2f3. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/SEVUE0200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26fee35d60d650abf297dc0128ae089900f27837808ba4102ccfce78a21a96a. 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/SEVUE0200112.