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 0x51d63d5b4c9c30f248ca24ced98a7d8d9c1ef52f7297275ec3a70e11a3783763. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e28a0fa4-f6d4-4b79-8da6-5720d9f98d3b.json and https://artists.proofprofile.net/proofs/artist/e28a0fa4-f6d4-4b79-8da6-5720d9f98d3b.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 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 0x2978ea39ddd515eb7daecff8aa12ab70884e1e0073d166750519e98b87588517. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAGJ2205927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a51a66f1965cdb6008746fe6703c005671262716629c1af9df3ed673eaa616. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAGJ2205935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0466f8a0e8dc4f2a61b266c15b95207bb6a45464193d4b82c2591ede9c44bd. 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/TCAGJ2205949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6cc4ac96c68ca8a3892ee3e13ccdbf64c13f73bb7285e5646cab71b3fe6717. 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/TCAGJ2205951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c02f189daa62b147b61f146f29fc3166038cd6fff0663e8220cac57c70c3fa. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAGJ2205956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d5e8ac09fd96f607d69ac6c4c3fc4b09c019b5be76081af38673960880566e. 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/RUA3R2149836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd181099027be33200e51ea867dd6b8bb737012617f747eda02a275713b92be. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUA3R2149838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dd244ece79dadc9a0ccdbd7db379440bc0ea657c9de5c92c9a91b0948822ef. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUA3R2149839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdac63f9897f1216f656c1881db70326459a115dbad6fa850915165399fcddc1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/RUA3R2149840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead1c9c1c86e3d8805e480c4258faf339f054ae5b20879a855a08e745ec9c44. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/RUA3R2149841.
Петушок и бобовое зернышко детская сказка
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9835c61e227abdd87548cfd41c0b50f474b8fee1a34e65d69993cf72a8708a4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUA3R2149842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad1dffc49366cc5bd44ceb1d11097054fc721d7a29abb92dd112ee9b7ef5135. 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/RUA3R2149843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacc850111ac1c0b72e5d05955d711a354e180c9e3e1f5c418fa02a960930a64. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RUA3R2149844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892d58966155369546f351b6f266b93fd60c9ec7d17f16933bf82b5a4aaa2f63. 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/RUA3R2149845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c34ad8a4fc66f93ed1c91baf9eca31655ded70f2fa00de2d7e1a94fb15ed6d. 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/RUA3R2141638.