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 0x9c4741eaaca68e8cdf5a0feafb10d7ec07e84f97795a301a006a04e6c8956d24. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb2e88bf-c1cc-48b5-9bf8-f0c09d2f7ba2.json and https://artists.proofprofile.net/proofs/artist/cb2e88bf-c1cc-48b5-9bf8-f0c09d2f7ba2.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 0x972132c27cbd83fc5d55ceb7b77e7237f5c15d2d8791d9a33894cd482ae2c33e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPJ32435174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d8aae06c3c242fe9012a6eb9f58a9e1508c1d8df67262707677d6ec288f90. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:01Z), 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/QZPJ32437455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1cdc42d158d0fc131fdd372ad96772fe047d707fa79040bfddc356aed8770f. 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/QZWV32550596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c8a592d6f76cd3a5b3491eeaa6447cba4678c26b78b8102f2097cead80017. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWV32553597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea5b5c0c1685161705dcd1478099cac6725eeb3f86c3b0f0a0f29a16ddce088. 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/QZWV32553616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87db1551c52c62da73da57b748931b8172c7d902638a6778798c41529a82117. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWV32561574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadce00f250aa7207145293996690d737e83d50d9323db4359dbb7cc9a43d5ae. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZWV32579886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf0f5982cf4e10156bbb30a0043f199e6f9b9faa20d5af444c40f7d7db8c6f. 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/QZZ8A2520002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb9843cda698a6d3e6cdc1a23d4ee7de25a658c22c16f7c16acc57d144a8731. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ8A2546039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c06deed9b4f3803366315e669b4621df0244706eb50f5715f4b244ae5a28a14. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:53:16Z), 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/QZZ8A2558856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ebfee36dc632ba8dfed90d02da55541ac760f2986ea96b17b91581211c96bb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ8A2589439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb010efbc73fd4786cbc15c4306328571b0cd7b6058264a45a3849a5d54f6e682. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ8B2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ebed75669289a05b5fc3f9a53fd32e55a2f2d472739ada658c179a6b7c047b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:35Z), 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/QZZ8A2599951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3633ed685c80da86dd9ddad328d8414317821156ab5ecba97aab6f1cf5d388. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ8B2542499.