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 0xe97896c3cec6124116351fe733d8eca601c0737258f1ed9b97b4a5d975cda766. 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/4a45e623-f946-40be-a37a-1110ff324d95.json and https://artists.proofprofile.net/proofs/artist/4a45e623-f946-40be-a37a-1110ff324d95.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 0x237da3da40946550aa59ad1a58b5bf7ce3658f5c3320e0309d3b557f7f622121. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/INT102000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cfc17f33c31389c6566c708709e088c7c41c6cae06aa92297651b5e86ad3a1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/INT102100442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3a63f23a01f2b9434593874ce2d052ad36de271faa0c9385ef714d6c61fdf3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:17:14Z), 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/INT102100718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cd51e9515f0f7a3a68e35936167b63b52db1887750822f3f02f63923fb2e3f. 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/INT102100801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a2cda05b1dbdde01c858509b05f4a5829c67fb650373b024110a86f4267369. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:39:43Z), 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/INT102201212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa73964c8fed03f325654500f07faef9c3e6e23d2071a56bac88d0c88afcc1f0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/INE182222205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc123bebecadde52c4f9e763197f7d3a681b7303ce36a1bbdad8b7828b49322c0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ING111049737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261973952c89e0dfa4b426898b57032f6ba5e9748bdc7bf6bcb96e015480282. 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/INE182439834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6462f7b904749a653f7ee4021f2a0d2a8683e5051f12362831416f46c4b03085. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/INT102305568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fc93db605519b5a2a5c72853f591b46c0353a2985ab1ca20a14cac240f7da9. 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/INE182447819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e3e6e929128982ca947eb3145cdda6bf23fd42d628954dc685f9318c9011e9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:43:36Z), 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/NL8RL2504869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f2265e5d6833c1c387fa32a5e389b16f8a343bb5374be3773aa9aafcbfaf13. 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/NL8RL2505518.