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 0x3d8cc519958a1ce4ce8ac4f7488de69bd11608d6e7cb9e5681c80116579e5412. 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/97f2cfae-c16b-48f1-8c5f-1629fd859cd6.json and https://artists.proofprofile.net/proofs/artist/97f2cfae-c16b-48f1-8c5f-1629fd859cd6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alice Schach and the Reminiscent Bibliotheca
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 0x1f8953c1161eab7d48ffc8006a49b7e5f1dbcf4d7f826f1886557ea1f94cb1d3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCJPN2177169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d18e6b535369d567857f028c3342fd693d7c2f82307368748ad2452077bbc1. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCJPO2133844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b5dbd03d9245d935983f4e0f692e32d0bd2d93532baabc60f5133b3b664a1b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCJPP2174404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fde241e98358aeb81819b71c8f465bcd224c61762d81dbdcb17596409fa4658. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCJPP2174405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0b213cc24f2b7c1ac9ffc7f88e1508aff23d3bf3348c97a0e6eeb301ff4664. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCJPP2174406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee341cee28927f8f2502421b70f5cac8d58bf10d4d1d400d4061357a839803. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPP2174407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6d1ff1389b1fd599e76d9ad63c51f2506754d5f1433dc9da19231ac8b86863. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPP2174408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64f7912b20287157081ca1e152a478f5411cee665f210fe9b6d144d3561d117. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCJPP2174409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99ea9d0e0c3a7385ff0afd502020f6fcaf0c54b87431744d8eb4a7ac24626bb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPP2174410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8037e46c7f96d53a29093e054463f2e909960f2920b14d370eb00f166bc907ff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPR2250745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8037e46c7f96d53a29093e054463f2e909960f2920b14d370eb00f166bc907ff. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCJPR2250745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f30f361f85a573cd40017e89c1602438f25b33528db79e2dc30ff228612965e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPS2294815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f30f361f85a573cd40017e89c1602438f25b33528db79e2dc30ff228612965e. 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/TCJPS2294815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d00c42243a1a123f4179a27732bb26c67a3ef4c0bbf1890303bdb2b78e1f55b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCJPT2212694.
Arcaea Sound Collection: Memories of Light
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274cf3ef128746710ed34867eecf29ddbf2f67b7fa96ed197bb21baf5a243b68. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAER2055542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b934651ed8e5c7620a2a2d5d23315cf7d518e914611d3aea8febb7b9969161. 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/TCAER2055547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1936d034980417b381ba2c32f18933d6dc870874142ab034775fb552251b53. 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/TCAER2055569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441fe0698b61288c3aa2b4aaca57cb61a8d48360263d5c1fde7bd53da6e264d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCJPN2170989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a8b12a043bad8a53c672fb1c560bf963733835a1a367bf2880c37f9027e543. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCJPN2171027.