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 0xa53e3dda1aaa9f2570775600e4fa9ee42cd21236e1932fa448b4e011dbe0610e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/260942a4-4196-4824-aef9-6af92c03dca8.json and https://artists.proofprofile.net/proofs/artist/260942a4-4196-4824-aef9-6af92c03dca8.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 0x6f20c84cad73b6fa72b008835955920301d45b3b8ae117a1909b7cbe10e24040. 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/TCJPZ2464198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a092de5849d0842ae8dbfde50c162650a70bc5e1bfb271b77336d30706a383. 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/TCJPZ2464730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44062441d3ae1e4ba83381c4dfde00cae7229d9c7a4ccf6170c275fe158d6d7c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPA2402965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aff524ccfacf1021606ff814e2ff8e27b492ac65f61f9e837832739ca2288e. 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/TCJPA2412142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae06a94329498585d32a3f7d2b4183abc148b4e687016b15aa086e32daba95. 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/TCJPA2412241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f7a05a4990eedd8768750cbafc6bc8854cf95a8ee97d154dc5201cabefc711. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPA2412244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380eb6ef1cb4272e9624ad5fd090778e849b62f406b0e74773951797144abd93. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCJPA2479939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6614c3602df062993db5c24a743ca27140f22f3a0937472cf6137f2ce958382. 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/TCJPB2479571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc97ec2c15308163abf3232c3d020729ba86357cc2dee46fb995b9e84359212. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCJPB2499588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887134be4a297ec4293cb3d6395bc97ec4e38d58f792373691520ced25b085a6. 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/TCJPD2411656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b029393d65a533e6598107ebf5945d5026574eeff66b46006edd6fa89e1829. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:06Z), 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/TCJPE2514204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31eb3ff6595f2bc45fe5ae042714f015e5da846d91981f5912a783be7ed78df. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCJPE2593964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31eb3ff6595f2bc45fe5ae042714f015e5da846d91981f5912a783be7ed78df. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:44:37Z), 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/TCJPE2593964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd135ff87bd4ca51a39da69b0ce57b0500b2381d07b5b31c90c9f5ce81f527b00. 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/TCJPJ2537561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99599cd9ee5eaaf850e698d0a70416822d87f3379555ba7f426086f45c94b76d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT66K2508181.