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 0xc6767a644e834829fe4a9d1b852489c2b528d27b57359bea8c925dacb4c22195. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43ec6ce1-3147-4ae4-9e4a-89fd6d58d034.json and https://artists.proofprofile.net/proofs/artist/43ec6ce1-3147-4ae4-9e4a-89fd6d58d034.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 0xb6ddbc1a1eb1e2b61fdceb6183f0369f1ec64a4cb088d64ab4bd424c90cc3ae9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNMY2147018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65c3dda6b78d95baee8f315077f7f0f48a012b66fabd1f5f9e944e7f34cde11. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZNMY2147019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3d8716040d7afddd6ffe55cffdfd47c108cdec601c2871a28194ea8be6af88. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNMY2147020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4496e7e205c27229555559df4617eabcf1e36da1dd75d8bb2fbc92d29986c659. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:34:57Z), 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/QZNMY2147021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fbe0a9078f7ac4a6c426a9068e65b959ee5069cc273bca3344d4e6de0d630e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNMY2147026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b72eca72d663a0778339a4e8e1f0edfaa44fdac2a2a87c1e42a5a48c4d05ead. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:25Z), 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/QZNMY2297305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efd2a396a6d49dab54d0a0a6532238390d3f66b1f2c4d3e24feb237105aa9cb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNMV2386512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eed0651ea2996da4b1f2bdf2305aa1822b073bd08336b4eb3029037e41627b7. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZNMV2386514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bc2912ad4597574caa325aa67bdda0786ba640f0edd8e9865485d675e70b55. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:03:26Z), 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/QZNMV2386523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7329c1b82df5c5b080d202366320522b47ff8649cda77bbdad40a0e74e0c26. 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/QZMWW2344416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2816ae37cc2be994391d37c1af142d58b00dcebab766f1621563a41c703a3a. 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/QZSYP2442970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cf40353c79c70fa36278978f9ee85921c085f8b6e6e4f18bb68299576c1819. 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/QZSYP2400891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60ce4f1a20aa5f1c2b19f6459fab1e2c02395b726f69c7af36df8bae16d1ad5. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZQAY2586762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d43486a00369def23c6f969d4c1b50345251801382eb2d1919d5cbb61b34a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTLA2591998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe32b25bc5eb5864e65ef24860a5571001fee2bb814aa3c583761d78dbb1188. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTLA2536498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a3d498ef212549b3f50ade6472cb0f161bc9d43923b75281def6ca18c0e0eb. 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/QZTLA2565443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13674305f2b613b290e830e9c90f16129cf7e420a2999c3dc1ed0cb418d56770. 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/QZTLA2574037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01ef51e5ebbeda3f2078eb92425f685fb5e5d7305ddda6bcaa59635efb1359a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTLA2521831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7282c4e8900ad263cf75d1e0ceda0491af88d5b635730e1fc264e898ef527c9. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTLA2559202.