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 0xe1b74cc77398c328cbb7a543d3dbb7a4cceaa5a3ccf5983941ec68eded53ddab. 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/ae24181f-1d94-4c71-bf39-938f818dbd18.json and https://artists.proofprofile.net/proofs/artist/ae24181f-1d94-4c71-bf39-938f818dbd18.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 0xb5613d4a4f31d6f223779be48094140916d0adbf3f542330c8ecafee703d0c12. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:59Z), 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/QZMZ92324468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ad5829ac7ac4601e9c575775074907bb1c6ee7e3fea39e10f09c34d0a1b455. 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/QZMZ92309743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ce72944d59c793c63507845e77230be0e6130aee5bf30fe887e23e33f157a9. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZMZ92360224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2db6a508194043649ee2541755507dcd7b96ff12593fe4818ca20b3fc53501f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:03:43Z), 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/QZTVM2393879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dee775887a486edd47a7d00c06802e4cdc6d462656d820914a9082e5e15946d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:30:49Z), 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/QZW9K2351441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e62733b81ba03b5afe44f483713c2ffed86d56d848b86563602200f342d5a5b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:33:28Z), 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/QZGLM2481047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40041b01670ab7f83826d7d348bbe1217b197b4814c964f450ab2f4a327fd02b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTPX2335742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8cbaff8bad81aba429292e7f5756b5321ab5cc19ee94b4959aa6317e89f2b7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMZ92414569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb67f057b57fe2bf68c63ad03f04eb1eb97ba1bb57941b266ba61a4a75d2ef0. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMZ92414570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ea6e8291727d671a6cba861261a477cda57f627109ddf412a1a27643490b05. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNC2420866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a79cd50b060d7e5a54a5afbd00be5ceb37c599dc4165087e5c15208582566f4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMZ92414568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11c4d90c6bb66e9f327b20e53c9b842c632929e19d206472a8145804e2896e3. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:24Z), 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/QZTPX2493516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf728c73f5dab42f156642d14d1764bb38c144482e7ecbf2a624b7dd7f18f82. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:40Z), 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/QZMZ92522654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f549018bd210e4dafbe33f6cf9a258122ace9041ad23e8179a467c66e78978. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMZ92560001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfabc5da291535304ea3a92ce529b8ab266ae79bc208565f120e20376830a92. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:29Z), 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/QZNJV2549291.