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 0xefcf4652ada464c1f29dfdc6084c59dc1e34ba428b7c4f3753c67a71980921ee. 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/f1f767c2-e0fe-49fb-b900-678676653128.json and https://artists.proofprofile.net/proofs/artist/f1f767c2-e0fe-49fb-b900-678676653128.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 0xe0ff036dc7cb45bb8a3858fba4e08b7a18413693a316e31d516a43df7fb9a7f1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BXPC12200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688f9109c733a15e430a5a0cdd3fd48cc510fb1feb7ebb0883a72ade67f2c480. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BXPC12200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46621350691e0d16c40841ea68a7af872d51519d75af0f296286038679ceafe5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/BXRXE2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8c5b83990b95f8873febbeccc1316fee5f990d5dfebfe5c2844d698403406e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BXRXE2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1476fae768362186b5483d6853e13c96d5f23d16701fba2c781bddc08c442e0f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:01:00Z), 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/QZ5AB2463213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72e59582889e61dba24b000440fc5650eac4f56130f67d0dcff72e329ef6a79. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKPYD2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b245ca2f22cb037f4d6e3b974e6dd66ca1508a334a6ddf0f77be77281316c3. 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/BKPYD2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993b9fb7f1db7f05b7949055f4978f2839043a75e4d6c4469898c8229d95d8a4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZW9K2455806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb914f592d8752fbeb1eb0ff086bb2bc1cd1f854940ab7678ba7dbfd25cbc2b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZW9K2455807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961dde1b71a99914bb2b27ee78bab37b3e83993522010d6dcf47c4245086a179. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:42:03Z), 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/BKPYD2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5127017eb5b1091f7ec7fc5c95221cb31c854e6d02f3edfdd141dd2ee0e834ed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZW9K2455808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07328cc859c525faab21524e5a9139f10ef75ce914db1ea27789ccc40b2483a0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BKPYD2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c29e5ac03da651dd6b2cdd65c6fe4e6021a6b10ac766438a584a0fba99ff6f8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:47Z), 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/BKPYD2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fd2d82227863f5538f16f7d03125d1bf7923379384b40ba2e45098959b4d37. 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/BKPYD2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9376ebae4a087d46c97fa8758c40d81e25c6e3bb81ff5c501074735d4c845160. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX202157556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce93ab744959c1a0d3658baf2b6f8a1dfade8f8f261597fb862a466cc6e392b. 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/BX0BA2400059.