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 0xa8308f8b4ad3bc0ed2f4dec355b606ffb18054235694d4d11d48cfaa5e81742a. 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/b513c2f2-8c25-4465-be70-67d904c0f9b7.json and https://artists.proofprofile.net/proofs/artist/b513c2f2-8c25-4465-be70-67d904c0f9b7.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 0x3a5388c3abef303b19416c3068f275c91a1bdb8b4d0475fb38e5670d46247687. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USL4Q2267463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5310a059401ec23c13fd4e6055977644c4d83eb319261c98bd04bc9c335fbf83. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGJ2326775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c62d97b6c2746f9272fdc7d7612706f8460e2203e0aa5613283f6f3add8fe09. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USMH92398020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f5625165f7e1a29d649635775195a6457b478c7678728b7ecdccbb1f94cee6. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USMH92398028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa276b7aa75dcebe59df65f680221d9ab3acc76cc2e8e92a9cf86983cee8a2793. 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/USCGH2445653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d6cbda3ec99b291203d8cdfeae8df02abf7772316aa36f8531b8fefc3c1742. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:25Z), 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/USCGH2445656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56fcabe685c2613b6e577ab77c0ab99b2162e6a833bba0424fdfcff32259d24. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGJ2474119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c568495c1796a99eceaf3915588c65a150c9aa92bc657ff820711b562b9b1f1. 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/USCGJ2474121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2611f9096e11ac2f5864e08f639d4d5acb47a01d54e17448f080b9315dd6e535. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:09:56Z), 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/USCGJ2474123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44db25f3dde83b82e21bbc7f31167370d7de1265a14dd24181f12e0a2a129313. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:48:51Z), 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/USL4R2477252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f54524ff669d2bfeac51229f4d0dca1b407edc7e5c9dc6837aa3d15b9a107. 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/USL4R2477253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee10f5c4ff9587cc4870772e84746b37ffff6a10bac206a75a684b8de86ac79a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:32:18Z), 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/USL4R2477254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53bc49a40c96fa0d0c635e3c06862793c9c3e1466ab01cee9792376c21f31cf. 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/USL4R2477257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54bd979d0dd2c731cdc8472b84290fe5ddb060bafd599518c710121d0e31085. 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/USL4R2477260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad628e95cf710049eb113743dd4bfac71e87dfd57d5dac91d21b1ce23303f58. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ2559641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209d22a1933ecf0a079b2362f12b79211aefd4f86f6fd9eee8dec658267683ef. 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/QZTB82507458.