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 0x177ddad0a41c7cf4c008930e5e894ff86f2dcae6faa885394fa539a413054787. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d70a21a-2e44-4937-bac7-542d49caf2d8.json and https://artists.proofprofile.net/proofs/artist/9d70a21a-2e44-4937-bac7-542d49caf2d8.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 0x1e6d2be98cb25973e8755a0ca55b11c6aad9248867b108ee4eb6fd5eb4897dc1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TR2231000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca4a6476b0f40dcf99776d8033da802dccd4dc94eb4c92e65226f53cc14163. 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/TR2231000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83236f1a4e1eb9ef8669b54eff24ab7537733b28767b2f9ce8d7fd90c48b11d2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TR2231000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4547e4a4c3dbacb775302efb333e3af8c80c08080d203424b24645e010e7ee. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TRABC1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6529989c48bdd13d50229d07e0b61b69f44838da40b7f6b2134941d52dcecba. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:17:47Z), 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/TRABC1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d3981202d860dd7d33c5364b3067af2531c796f33d8a392d1835ded8c02b2a. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:31:47Z), 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/TRABC1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4383b2c0a282ff09bb34c199071c0433d2aeec2d2e323d8ef00a65e79acf9c42. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TR3731400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ac95f71595c6f26ab0acf484a28b0d3d6df6568895ad7b59fcdd0bb9e75ba. 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/TR3731400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3fa64e5615134c1c6caf998daf151c3b2805448575e73c4b0849119fd13e8e. 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/TR3731400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e7aae1df51cb55841ff45a2bccddcf557d5b16edd222e85e223054fdbeca09. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TR3731400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba522c410f951501d903a9bbcf49497faea93d61062b5f7e814a147a942767a0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TR3731400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363b772802872453ef67bf41f3a45de387b7883733608519bbe15cce19cdd516. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/FRX202272921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af2eb0cfe480ba32b274ea6fd3e5257a113f875a04ce2dc9ad7635649c4f3fd. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX762170824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b70dfb876c5de0946916ed752957c082c726fa75d08eda58a012ade9b6fc2a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FR59R2231048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b70dfb876c5de0946916ed752957c082c726fa75d08eda58a012ade9b6fc2a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:03:04Z), 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/FR59R2231048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2166bca18a6b29a3e33fcf2d8e64cd08b33c35f3a15934c307a962a57bc531e9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTPX2254123.