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 0xf8abd8c45d2d64848bf40626b2fbd5788b6856c99336fa7b1f7f27e112222045. 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/1bf2100b-353a-4cae-903a-d06b6694f216.json and https://artists.proofprofile.net/proofs/artist/1bf2100b-353a-4cae-903a-d06b6694f216.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 0xa33202366b1f82981c6cdc00a766d6bba0d5a649733ed4d5e6997be30e9251c2. 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/BEB682300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7facd96a44ba2a0dd55b38d1bc1419f3cc5f07b17864ebb8b61403893d4ecc7f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLV62121992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6aaf37424f972bfa17e12e66e500a5a9a9b071264824e23c779312d921600d. 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/GBKQU2251758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb2425e10abf07453ed119456f8f4a8e5584ab4b52b949eb5544d55d101ca9a. 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/GBKQU2317995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b462837100fb5d467b7869b6212e21ed62fda9f3d453a565c403c8f4b04f52. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBLV62016979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe217ad085d661495e3cf2b20aaa0b1615eaddbbc3191de08a883d6d298aa7c84. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBKQU2453570.
Hit 'Em (Exproz Remix) - Exproz Live Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d6c12d070a27852d39723e8b30f1236b2719d9a327796595a1750ae6f55125. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBLV62415803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e8bede81d2c9a67f38a9bd7a0d66eb714c8f36d441cb5d81be0a5a6940f6dc. 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/GBKQU2420118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9a00dddbf82cd87e19faf9f518f3305938c27a10c1a34aa046abebc0528a9b. 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/GBKQU2474438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe217ad085d661495e3cf2b20aaa0b1615eaddbbc3191de08a883d6d298aa7c84. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBKQU2453570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0817019779abf6fbc328436d7b2e13adc31164522f959ec6a80033ac1bbe2d7f. 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/GBKQU2498702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200985e00bd1c2aa8bcf6bb530a7174e62a670b8e52656c90c3b8fa8aaaa0e2a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBKQU2486110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49c5277df8d2fc1c14af5a107d9674d0f8d5e2a7e4d474036789ebf2f137f7f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBKQU2390758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4637d70c353494d86cd23b0e04c82be5130021fe63a5e5a7f0efbd9f6b93f5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2356523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18c4db8b799323f3047b904f48623091b3d4f1a1e1229b588a978f37eb53b23. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBKQU2344126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db285a004b91ad63bd25367b54755e2d3431a89c5955b0230e93b3d77db90e2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBKQU2521192.