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 0x2d743770d05fcd21f45e34168703569605cfe6ff1ca5046ff5625e82b9f03ea4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6dc172a-59ad-459b-9830-01d282a7ee22.json and https://artists.proofprofile.net/proofs/artist/a6dc172a-59ad-459b-9830-01d282a7ee22.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 0xeb9b3e98475f0275674123924018c5d3bbbcc8019c019389220bef12f7c5be8c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HKG732013987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15e2f79146dfe2c12a5819b50aab431a2de03e41e51c2b2a512cd487b6d946. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HKG732013953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb669522e3bf15accd2e265e166313cd7dc8710dfc521bed806221a9af4263b. 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/HKG732013761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a58f99d503a17dd35b7d8d87e7004026d5a945ea7e7f764086793d9fc40a2f3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HKG732014659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba6003f2fa3b27d551b05b87a8ca5dfd4abbdfd18358cca0d578b4f1ed27e6d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HKG732025122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf8650cfcfb5381a34ae0a76e1dc0fc8e884545d0d58d383f3b26a933642ce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HKG732103546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f2c9b051eef7b44c80e3be45d95357b8a0ccaed83f11bd6bfd34b014b474e2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:28Z), 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/HKG732110404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11d533f93e8de1218bc800a64185d7d3b44f5e19f0dc5bfda0059837d46831d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/HKG732112662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebacd030cad08121afcfd2f8a07658881993ef1567f948a4e5030b3eaa596b5. 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/HKG732139133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2528b69f9f425a6cdb7705288732e7a656ab13c829ae8a473144a5e5b2663af3. 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/HKG731748525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc928b8bd753704be53e8fdab6d218526bd9f424d8db6ce5ce357a8e139f86f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKG732230332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44072bdfd8d9f5942870d83583b2044cc7a4842c8806bc41c3abaa79b6014d6d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:54Z), 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/HKG732299343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d362afdd4191cb4f34421b4da5ce9e3cd4f0e2d12b6a6287364de0c995fd1d8. 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/HKG732305949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2a6a4a0e15777c08d7f40b62561082513c9ba362c6ce982372e06efa1f4415. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKG732447269.