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 0x771bc8314eb582a808a00d385c09ebf648a766dabffa970ef88da9d7e5bc983b. 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/af6204b7-d387-4d94-b925-61f172191a77.json and https://artists.proofprofile.net/proofs/artist/af6204b7-d387-4d94-b925-61f172191a77.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 0xb2142c683b9ed17a2111999826f30e5e29af0d4a7ab99e322f62a583cd36fd4b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:16Z), 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/GBSMU8697514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b931b159929be817dc85d8b2d11eff307adc2c3d0b6d538e44fc241b2c9a8c. 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/NL2VN2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6abbe07629f02bcc1ab748700901277393d167b9d5d7aa4efdf650c655b485. 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/GBSMU8888224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc197dda06af674d3c20915e4226bb41e50ae58e5272ffd9ef1b67e89ac002f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA82120224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56772c43490faad144f3d2704a44ae0465e03abbe8d2d6fd18a350902de5ab. 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/QZDA82120253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11a26221d4147cddb131a24d6ef532526f4b7cec9f3ff15ecde6e7576c720bb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:20:21Z), 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/QZS672111057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c1a82913925f92d9c0506a66a31b8e235583e6ec1d09ad461228f073a31d58. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBSMU0105176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de193fa67300bd1cf58f2bbbab76e1246b2d98e6d3b7bde0aba7e49a39645c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZRP42272277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d615712470790833b8d402801c1fb9f950fe0750e32333203e9567adc583424. 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/QZHN92380834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026801a5f47eb0c1e35cd632da5f9ca7535463aaa9cbab352d59f96821d82520. 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/QZHN92380835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3fbe1d573606a83374e26125ab7d09e679646196824243bb72dc0b8ab8e243. 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/QZHN92380836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd810b633dcf1c787d30fbdbffe26c12e9b5aa8cd28383284ace69868ee0f92. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEQ2301191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b26c2d5ee04f70054269c5f4024d3301b6e8b555d493b539dd4959e1fbc7d5. 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/QZMEP2398636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4c77ef8ff014365eb8f3f3dd7d37413f064851c6f5d189927673b458c2388e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:47Z), 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/QZMEQ2301188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb98b15ed2949cd12abaf3630e8d808ec81fc5d18c4c7a85be3e368c966422b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX8LE2443896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551d86ca1b0ddfd08f697e35f900daced66807b911797c047c483fca32d89804. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:12Z), 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/GX8LE2401010.