thumb|right|Trance Allstars Trance Allstars is a trance music project created in 1999 as a collaboration between two German record companies that specialized in dance music, Kontor Records and Polydor
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 0x0273b7c847a6126bfd8c81035b5e1661b1fa1badb5130b627240c5ece9dc43df. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f7ef398-8b58-433b-88ab-5684f04e00ec.json and https://artists.proofprofile.net/proofs/artist/2f7ef398-8b58-433b-88ab-5684f04e00ec.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 0x90f29de3740b9bd08a8f2663365f1fb54a017e5dd1e0f326fef6ed863d8c7025. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN120110392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bcfa6c25880bcd8533661d9edd1cafbe39a628529010fdf54805a356a05812. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN120205260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8134b4406a6b379eb47390f59e5a8a43fbeb57e088e91c046d24fa404582e31. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEN120205851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f9b3b3234c5e7c5d09fb902a778bbfdb30952b77917caab1881fbd456744cc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN120205899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43e7fc2e13aff9f51259ce7a5ba958dd3caa15eeff684a309a2739e883fc198. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEN120205889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b0d596d3f033db7f408f3e7dd678bc3d55d08bbc7b311566c575db29f3ce76. 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/DEN120205895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a99d79c809693ace5f709574d677f88d41e2c35a6b401e43390477253864b83. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN120205891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aac6de0c2d9b44411db437afe74c5497c08abb111e86e7790b168a403d1676. 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/DEN120205896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ac172b0c1864e3d0218434b8f9ced3249aedb0f84e34aff8d307580d8b31d4. 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/DEN120205888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad75ceab8432490208730eda044fd2622bde6ecaee871d1f2f59a217b615a785. 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/DEN120205886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d708b3b2f7addbad52ea256f587a5883f895dc5795aae889e023170e9f03e60. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEN120205900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cb8eeefed875462442e090e58837ccaf0e05f53c3cd0be9a6332fe10484bce. 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/DEN120205846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dfc3e1cff84b595ad48a30d36b5e1e156872e259a45ef3945a9074c030c088. 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/DEN120205885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358897b1b1e4c7e2ae3faaa405f242e7599f7993a599e6431ab781ff67456cff. 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/DEN120205887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054c15512922f95ed2a77bc6c15b3b4acac3bec10f2ae2169ad85a8efef1bb1c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/DEN120205859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337b6fdf29478e931b9f78252d3800eef820c0b5b1677a31538befe12daea73a. 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/DEN120205890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a40801f862cdf70bd7da40537f644983e4a015f1891632b5b04dc3fe41ee74. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN120205845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015c5956d8659331001b425a206d6a568f43fcb5f88d7d63d9990105e3276caf. 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/DEN120205844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efff5b6c3d1d17a6211cf0aa1ad1cd4e0cee27636ed44d5f25d796899c28e57. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN120205892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6d327a04e9eef53de3aa992f834fe9d39c2f4d6da37bc7427a9fed0c3afa76. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEN129901471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c70d05e0b21fbbc18523c47be4eac2d377c7bf3d7538776d965e8f7e9a652d6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN060301192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb097c4fc41294201fcb78c7ae7ff3f0c3654f4d3f9cc6f68e1137aab58fe23ec. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN060301208.
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