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 0x04f4e1d650315320db1387d2c82771968a6b6d8f17b2e0abdd20dc8c5a73a89a. 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/d74b9bd2-72a3-41ff-8577-ea0555b970b3.json and https://artists.proofprofile.net/proofs/artist/d74b9bd2-72a3-41ff-8577-ea0555b970b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fóstbræðralag (úr söngvasafni Fóstbræðra 1916-2006)
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 0xf5cb6fd7086bf72ab1c1199f7c6d6361dc78b62e71bd6bf77a8c361e6f93da42. 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/ISV201000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e58e544d4d3a1169afc45ce86b21225e58d4c3a3c6acb542b560ba023edaaa. 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/ISV201000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd613bce0bb84a4c0a331d8d395e2cb7f68d0669cb5b14170976ccfb6e744fca. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ISV201000104.
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 0xddb158bb885d9c3238333f6917fa64f3b27e19543f0cf655a95bc24085767c54. 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/ISV201000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb8129a6a7e269f6a5b1b3e568eb9b8682346697fc1c72785df099518a669ee. 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/ISC109800536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2b1d515c6ada6a8ea164a735e374b8eea8ed303b3501410ef054beab23093f. 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/ISA110503401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49816a2cf105e5dc85d606c4489c82f57408ee46bbf59d9fae6f1f3cba3b2223. 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/ISA110503402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93fce4a53a803c13206e2474f203affa1766778b24bfd5522ad6042621b9783. 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/ISA110503404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff963f931d44c08c5b9931f776efca4c44149423defff084bab17bc2a49e4077. 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/ISV441734108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71bf9585a3472a976e920f8d9505d4d98167e3eba11f53567829e8456c2b39d. 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/ISA220800312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d04d88538522a485825b472349ad5e57e778a4959fea9137a512679c81d9c5. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ISA220800316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe772380932d2738f4bd7fd943c107e9fd2c9aa63c317bea457f44bf41a57931. 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/ISA220800203.
Manstu gamla daga? (Vinsæl lög frá 1952-1959)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a67736b2fb5eb69754dace182f6635b2f1a642768a2c7f098608503e26f3a5d. 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/ISB111700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e633e632490f9ba8d95cb91498f1321a4ba30251ac10f703c99c69976da3515. 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/ISA109601311.
Guðmundur Guðjónsson syngur lög eftir Sigfús Halldórsson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfb860cd6da05e5c9ad177dd062194a051292c8a826e28ddd257da8c34c4382. 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/ISA110505812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2700bf42ed6d670f4a46bb6d8cafb87cde4f537ad0a6d1215c63344401686e. 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/ISA110201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fab9d8d632b4e26ef601429e6273658e93907d825f0d0d44115c754b511e907. 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/ISA110702202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae4c4771211b21da733b68bff9e62df5dac51a228a463de32c494ccca2dcb96. 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/ISA110702003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b78299569ac5522b10a55157605c7316af862b7f59f4a01ed0caa9b73a4b42. 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/ISA100000802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d737aacce34acb4c2075caa01ae156a3b0eea718a232eb622e780e8442c67. 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/ISA100000805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05540329a6411ee9ead46e3a5a5d884a7060473f4d9197e62fc7253cf992319e. 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/ISA100000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdbc71584a1e6ac217726ce6f78fd3d0e2621d353c4467231bdfc808aa4ebf7. 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/ISA100000811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228039b6c7316c438f944dd30029f197b1b96ba014f8f0aa49af243148051170. 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/ISA100000813.