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 0xcd8b85f64982bb46bde8c125fd5ed7a623af66805320e7f56b017114f9ee4e60. 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/f76707b6-5f51-4ca0-9bba-bee3f1cc733d.json and https://artists.proofprofile.net/proofs/artist/f76707b6-5f51-4ca0-9bba-bee3f1cc733d.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 0x1262b6dec544bb00a5ee83b827b7a1b1813e36730fa490bfb503767cd9e41e02. 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/QM5LC1900333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6538a71cd9f3ac8a650cf45a6a51ce2a0b6a670d7be06f3cda29175283c043. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM5LC2000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c70d106f359bc8ea691a9fc944447676cbe93b94674f28bdc05e27ed022dce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM5LC2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0a599b99c9a34d7345d84154f56fa36006e88ed9081dfab2c62dbe28526ab7. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QM5LC2000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe170187baad113db8e778e74ddc4d08010c0caa70d74a4d59f07a4b9689bc6e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM5LC2000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7727d8f2d26495f93454831589127050eb41a2b24bfb41079ab6c64f3aa8ede2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM5LC2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd1026b5834b907132eff5dec026f6f36392c5034615e5c6d5885dbbdb96a8e. 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/QM5LC2000249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb910ef846f43c6f678eabcc494a6ad126c71a0b236c0af0581c8a347cc47b6e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QM5LC2000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdc2381f407c82477e4968438898a96ae41e042909740eb2bf72844a47fe4f6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM5LC2000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b482357095f64eb6a97d6044d3fdbe82c2686cf12aa54c716a232692f1260c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM5LC2000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae7e45111da70aed5a165b9c5499c5924ace72d0ccacb51d8b270cb6663015f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM5LC2000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26f136c05f0c604a4d0d6aba9c60bdddfbce80664ea3da94a6b7b027949c198. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM5LC2000254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90e6115a205d8fb2ef8352517e4f771b3619300a426a28afc96147cd4c90a24. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM5LC2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b813182666fc278f26bae240a4f4baf92453f10d1e50fd10b452261b87301. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM5LC2000423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb000f1b7b85895fa922260dc37f277f87b09ac77ec190e52f5ba5dbcfc7b52cc. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QM5LC2000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b26c5279fa65a6804bb7634eae28348b4b87d6c32b997dcf51612cb3dc62ad. 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/QM5LC2000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333c9ebcabae1d0b13c844d635b8c2982ced6f7140f431c377157d0eb7e32801. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM5LC2000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e0be3acd1245f563242c4f1feddcdbd6bb3828a8dec5ff81d872125bb10253. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM5LC2000252.