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 0xe564b76d2c060d3384c65604ee64349880f0eb58a3602f0a13dffafbb6063a8a. 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/ad8eab21-5f66-4dc9-8a76-ef7bad670192.json and https://artists.proofprofile.net/proofs/artist/ad8eab21-5f66-4dc9-8a76-ef7bad670192.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 0xda529bc87cbccc9408bae8052870a6c1c52d49c76df62ffb2556d4e8e4730053. 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/UKG8V2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d07fae8db0fa13dda3cf8c8783e34f29ccabdddcbf5136eb16f9b8744d089b3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKG8V2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a509bff4e64ef9c7b2b64bb93869bb9906609d8cd70acbda018dca969cb194b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/UKG8V2000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bda44f4de3613d2e0a79c44279cb44366392e54d35b234e1cdb24efad7517a3. 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/UKG8V2000633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bd85f14e8137e07211ec4a894f7b42fa37c469f663bbb70cf233b3b160a20a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKG8V2000634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c0d98b2c751d1abd16225880fe9af967bfee186c4e2ba338b1ce0217c8a3ec. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/UKG8V2000635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35f6e4d4569c0cc7a53fc581d577461f7602f0c8e0c33c5e1f5e307347e4ef. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/UKG8V2000636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888fd9cf81953c448995991275865e57814781bd7e13f907208544362d5b147. 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/UKG8V2000769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a92912ae2afe8b2bae3d5e42eb4300bb455dbb283084550bc64a856be53ea65. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKG8V2000772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9458157b45b3394a77d29a1274cfefc8219de25e8ef8977cc77f3d79d497f8a6. 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/UKG8V2000924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174595c757532ee65ff4904e7edfdf25c83748bff8658f19c55c277fabb85071. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/UKG8V2100857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a07c25a6d3102471dc7be6cfd154b851c77c975d34e5fc774feb562d77eefd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/UKG8V2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731310911549c26b313e3dda4ae7247f3001244908713d24eba34f94f8935c27. 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/UKG8V2100858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3be81b1fda0fb0501b053baf68867fb198b009af61ccebecffabf2d99d26c36. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKG8V2100861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64e3ad318814089f894c92c3b58905500c0f06c51dc5e0ee6316d323ecf4dc1. 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/UKG8V2103280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3e2a3d95b0369e8623e4195a551ea5c8ca033a737f2e56468b48195bea93a0. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/UKG8V2000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c0d98b2c751d1abd16225880fe9af967bfee186c4e2ba338b1ce0217c8a3ec. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/UKG8V2000635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bda44f4de3613d2e0a79c44279cb44366392e54d35b234e1cdb24efad7517a3. 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/UKG8V2000633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888fd9cf81953c448995991275865e57814781bd7e13f907208544362d5b147. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKG8V2000769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bd85f14e8137e07211ec4a894f7b42fa37c469f663bbb70cf233b3b160a20a. 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/UKG8V2000634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de951bdf2421568b9fadee2030c58169ef84fb0f566f674107b30442200c6d9. 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/UKG8V2000927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a92912ae2afe8b2bae3d5e42eb4300bb455dbb283084550bc64a856be53ea65. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:34Z), 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/UKG8V2000772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6833ddf0c202b24f7adcdc6f02bf855e45989bbb92822d28337de277e82b8bb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:37Z), 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/UKG8V2001058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343b2c01ab516e2376309cd7816f197b1e05e5b9dfb50179a99a91545a0e183f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UKG8V2000928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ad3b3ce65071953ecfdc26fa2a4cc2ee61af68622c0dabeeb801d01670516b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:58:42Z), 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/UKG8V2000925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27275a7a80460501d2a15ffdc66b4135959c2ba9450dc672f61659444c54cb3a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:02Z), 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/UKG8V2302993.