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 0x24c78276b46c6d3a5902ff88097b5fc6c182831d2f1d83ab29aab74d1da1d223. 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/5011ae39-bb62-4e2d-9179-eae4ea92e336.json and https://artists.proofprofile.net/proofs/artist/5011ae39-bb62-4e2d-9179-eae4ea92e336.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 0x49d48b40fb31ca8c0bccc3b05335641307d257a33e62521ca536814e076995f2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/USJ3V1137375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de00f4d410bd14d51a29a8276541ce10b9ada42ce750ac1b86e14038dfff3f3. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/TCACK1586727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03410aaa9aba9fedb6e6abd7fe0448193a1e47359e687f281f368e338bc1db59. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCACK1586729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7048cc31003e68e9773eddb4dda7b40cf9b51b4393624f2845806268a8749e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCACK1586736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe80d47e98c4157d6e0e91e01e79ee14ac3ffa8c3f92d25ed0342e87426c7b53. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCACK1586737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df65296c815a707081a2a298af5b74b6ef870f37a581f499b47cf574dcc8d9e. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCADJ1771762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660141746c17034691eff1ba8d8026dc2725b441b0970fe826c85dda1991f38d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADJ1771770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8727c5ad4cbe2f6317ed2c4bf458318a8440a1ca106bc507128c3e3b3daebbdb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCADJ1771776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5aefbc7ca2f2b48d05f85dc96ebe1585aedd8a600a3be7c187feaf70d646b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAFM2138446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30552580fa91411149220ac9f93a7dd84dd3100614c1d58a89bebc9f04353d17. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAFM2138289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaf6c2324caaf9e8aa6a27211a7043c224e762b8c598799052a8d9969060798. 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/TCAFM2138316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec157f119e74781d2aa9ab7b04b3a1fb6f449c8d4df9cc8a4f0e552903e1d24. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAFM2138351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599b9fff2f1bcddbc85e6b0830a71b6d3fb2479a0ea47f171e44500e8789a717. 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/QZFZ22368652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133997f83c40f96a9f58f057c05475d62630be38c71a04688bdcbc80300e717f. 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/QZFZ22368654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3b117d11f0354edd361242eb1ab2ecfe2de494c699eaf7d32c5492e917847. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:11Z), 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/QZFZ22368655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d765079f42b371a7edefd3f0640ce84535d2750270d7657ebded4fd07e5a4dc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZZ7Q2439839.