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 0x5601369397dd7c3c290055f86b3bb4c9dcce571f846cab4fbae3bda094bc55fd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef3993fa-eb53-438c-9b52-1d94581f1cc1.json and https://artists.proofprofile.net/proofs/artist/ef3993fa-eb53-438c-9b52-1d94581f1cc1.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 0xd95a303ef281470dbfd35459c0e4be5337f54d4a1ce4c2d381a8cc2814ddcb27. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/GX5MX2280333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474753d248a495c9b978665d57d40bd416ad80bbcef8bcebac9f94a9afdf4306. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX89G2213088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced1ab32f31bfc6b275068f9e492d270b2f76fdc37bc8cbf13787e95ec9a884b. 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/GX5MX2386192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee4ef64ad75f79fbc6cf2418695eb2f9fe22eacdb5b61ecaea485ab667804d3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:30Z), 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/GXBDS2389198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a44f687fd1257965bc73fbd93bfcf184905690bc3270948b9a2e3d57ed17f2. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:06:14Z), 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/GX5MY2311688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9b99b6894d74486fbbc63eac0707c72cfdcf65db0506bd2c412b77b9e71eaf. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZVEM1874392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4d11a214f924f882326c5d2b6d42daabf8f405f5847bc1712159925fd7d4a8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZPEW2572086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdf2388817c0f9ed6fcddc500849ec374540888cc5560e2f987ccec746577d2. 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/QZPEW2572087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cedd0e5b013479650aef078046186091646fb8b85aeb893154c34a77da969b. 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/QZPEW2572088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ea26a09c4aba9ce5a251e4b9d433a6acf49d38868666cd8f0054e6750338bc. 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/QT4K32516750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee87f3e60bf4516491ef6f1d5eb45106a04b84433b3cb79e6b2e3c831905847c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:57:55Z), 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/QT4K32516751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7920f0033bc0fd000816243dda3b509a89d59875b2036bf9508cff162a3b9fb4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:23Z), 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/QT4K32516752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e80dec497e99e7b570f758f1433b355164b3d90ae69d10f0a5b36cabd397a3. 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/QT4K32516754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f03a8ccb198ec1a6d005213423dcba6c4dffa370dab6e5829bf258c03dbb068. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT4K32516755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525e57e36934a4e0340d25fa7df40b649dd4210d6ec38f8c2275e1b3a575c078. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:45:41Z), 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/QT4K32516756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e30f5fa9fd0605580d805d9e886ba227b7f8a4c054205d22a37db1d073a2fc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:12:11Z), 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/QT4K32516757.