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 0x6300e1562ef1e0ff0290e6c20bc17f7166feb15336dfd3dc09797f084e38f617. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31cf4aae-f17f-417b-97bf-0399fc889190.json and https://artists.proofprofile.net/proofs/artist/31cf4aae-f17f-417b-97bf-0399fc889190.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 0x7c0f8fb98da6a7de48467326af7e9dda11a7bf6cb1ff1d3392c4467c1db3a2ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282266988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1828e6b211184d2d70136a133e73aecb508dfc91be58903e4b7a1d5a5c62f55a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX282259483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b41534927530a8f26ea07be7ac2829f03a2fe9cb7d5a9dec7bce918f87a718. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282259037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108c8d66c62a325003f9796a6fd7654b79e18c67ea1253d045bd97ae441dc507. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX282259148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf403270dceda889c643a3cb5283166e2ffe6524ccaafd606d36eb9c9deffcad. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282259152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5bb77aaab28d9c929fa01fbc0ef7dd0c2adfda75156707fac1666cd2b28b5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX282259153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebd434c29553cf9ff60e8876941268799fe3a8d6a5cb2a423dcc54767bada55. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282259154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118a1716d646a55cc1d6586dabf9b7a16e0735a9af84d02bbd64b7f7e947603c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX282259157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee85924f8be48bf821e7bc674e0040e0f41220c691969330332c7857e2a14ba2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX282259158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdc455ded986e32b359495354841792b2260d4c9f6acde28baba4badd5ca854. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282259159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8caabef37a3e5c07a8601d00b407c2799b88b35c4fcfe4a5b6d7ad63aaa4c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282259160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937dc10a8c0f6b49020434101113a77a47c4d6381b03f60625dd9f6768a549d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX282259162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35643ffbb2ee5896a339e352aa0a022d3af8ef9f9e366ef9d651d071a7fc751b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX282259149.
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 0x3dac020e6c326c7197208b946c3d9f008a13b502231d509eee94f179a19d7d5a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRX282259150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072475db0c7e3cb5f9a26931c81597132a710dcf918a6b832e4745e7c0cefd48. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX282259151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe0fc4aef596dd202931703a452f0ddfeeadc8e5a05909a8d593bcd97309682. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX282259155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ff3958ddcab08db0cd4113461693a7752b668d35a4748f7b030ac760accc6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRX282259156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfce48f72b48e282b1f4409a4488782211eb4c6029e9df5218186e77447c350c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX282259161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5463461fcffce40b0b97b781f860be1b65f3ac3539f2d5411038f8dea86b1bc4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX282245170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913ded56c4df1f91557e24d2bdc54f5e3a4f2a409ad44ac39fe253caa0ddc217. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX282245181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845701b3c67c67721d94ba1326c48c0f4cb26d6acabd33294952d292245b8df2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282237633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd560639d70d2754c94986c9bc0c62a9e1879bf84555b3061fe5092649b9ee3a7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282237641.