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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4357a7f1a30522f1f44898374d0747889cbf8ec1c1cbbcc0b650d83f80e7d65. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f640411d-7d55-4b10-aa3e-893267d22040.json and https://artists.proofprofile.net/proofs/artist/f640411d-7d55-4b10-aa3e-893267d22040.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c61fc638d7e9afa0159de915618add073bd3ea51d754d96d0cd4f546c8cdf9d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USHM81026087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd353cbb3114070fdc3044e6604f87c813a62cda8795f03cce2afeb265841a8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USHM81026089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0af5f0e45d286b63b14ded12bb448387771ea29b9bf14c3fcb09c471f86d2cb. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USHM81026091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2f424959bc40d5e933f2f4e282ec2cabfbdf79519dbea08c284e2d7a0a946b. 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/USAT21402794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8781ada25e789f07757b4789e39098e09c2db0e7fde4ee36f44f1a1ef4d52ef6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USAT21402899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7dd445710aa1555df8008c0d440c3badc843885585bc7018475758dc13227e. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/USAT21402903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5d6f69cbca46308e3cee6e1ea19c2545934d44ea53187da8550c1b8f9055c8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USAT21402904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7222c1cdce554a168dd296c57cc037f579e6a7042adcf90ca5ac5ab89c7926. 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/USAT21402905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5fad9f0a9e0be2ff121f49d959cd74d680ddd818ff78a347114f1e43a2712b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USC5Q1500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c3a8df96d53aa65a4c6fe3f735c576a2b88944a011f9fb59d5ab6a4ba17658. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QM7281860730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae77513607f40a4642fbfc1bb10362a156bf3669962d598b058c0ca05b75f27. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7281860731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa701b10b6ecde4b69199fe0ef2576074eb36eac1d77d46f447659f31d3042d43. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJW2301529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce40ea4234fdeffced2c6e63f7c679736880d8f7ef29870319c06e4af9513e8. 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/QZVEM1821680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ac993f8de0267770639f99fa5df020b5d72d684c300be3b6b68e4d30f10c0c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZPEW2577989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd075772afc9e8dbd53c30985dbdf258622b056fb6860c1e7cc5d19d9c74a0e04. 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/QZPEW2577990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915c35c28cdd7c5e2bf68618cf7183e5faac788730a4b3587eed88f170ef0c37. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZPEW2577991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511a41696896ce8e3da967694e996294d638de33d773b1758047d52c04b37700. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZPEW2577992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5b8813f1086d3882196dbb989267f44fb8dfd183be5ce73cf433b122940048. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZPEW2577993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f97b71e2f74311205a41d4a279ec3c09f4c61f921f8865ff2ca36c01947573. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZPEW2577994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44bbf0c812fbfef708039c1884108c996176d9599122bba0b32b19e367e9e9b. 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/QZPEW2577995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1aab24139304027211984a8c9364acfe2df4ed06599eab4375b9c953112ba. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/SE5751976847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5d6f69cbca46308e3cee6e1ea19c2545934d44ea53187da8550c1b8f9055c8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USAT21402904.