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 0xce2a55edab2c4f3cb7db3573ec08d8f3b943c0b8f27361b71c6c3a50f9fe5793. 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/8d5b41aa-08a0-42d6-a89d-d0f7d3fe3993.json and https://artists.proofprofile.net/proofs/artist/8d5b41aa-08a0-42d6-a89d-d0f7d3fe3993.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 0xeacaf01442fae4ebeec60d18ad2b60218924b4d4030de097d61449c2ae8b253d. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/US4DT0610037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864b3bf6a3b28d19f71c2bed41d9eb6f0fd25166d825c8bddb2a214b564fff44. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:37Z), 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/US4DT0610039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781903a7f845d5358e9bf7029e2e06ac7163cd31a16740d97b155c4a462b5343. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/US4DT0610040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc3a6efda928fafbcf716712e8643599103ee0e90368697a43425760b930fac. 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/US4DT0610041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970348f13c8f457926a8d5909f92c2f6636c2ba4debbdf879fb16d2af998480d. 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/US4DT0610042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071d493d35d67f87de77c771e00b03f77a9c5eaacd81c0358b00fb24fa3d1741. 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/US4DT0610043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25fb3df782bc05fec3713850c79d08942312fb20e58bc5aef6b49908f5ceb79. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US4DT0610044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa9c40ee733364acc16b32f8941a25f65ab54fe95177c2e42517dd18d77b826. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:06Z), 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/US4DT0810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ce6f7a97be89a376fad47b26179c3d452471775c9817da05c57c31a3d80afa. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US4DT0810005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4087a22df0b8de141a774bfaab6bf3a3e2a0089c001c301defd643392cf276. 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/US4DT0810006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e982e43118101f0a2ac2dd85bc585aaeaa1a7d3ce533ca77ceec06f6cbaa3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US4DT0810007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec106ad324e52901aa87b4a09656d50e8dc1f0ec60ad113f5c0e420b98efb9a. 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/US4DT0810008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820019501c8ef0268a149b8a88e982da7a092a6b22f6ebbd8f770357819b1952. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/US4DT0810010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76705ade758a6d34c9f290ff975d949df85d22e084b7327c8c42e47c0706b63. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US4DT0810011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c0bf4a5a2c61f8c211041c200c28075ff5de54fbc6b4acbfdc3505530b3150. 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/US4DT0810012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94483306aeaa65fc6447d07b15e90ad86152a6dcb3c15c3c7b2da80b673b99c6. 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/US4DT0610045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0abf8ac98df5083d197962313bf9f80f7c64256997e3d70d181854ea678690. 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/US4DT0610046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e01b44b8762d547ecf69446247d1a5d4ba77da0d5e65908b3fea9745091184e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/US4DT0610049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500dc65f2e86f8c792e6fe68fa1b541fbe90918cda06745225c3b41b2a4d9338. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:08Z), 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/USMBR1813181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98267c4bcf030cbf2860f121dff94e30b3c32bd89d69df621f2913cc652c6057. 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/USMBR1813182.