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 0x2c270b367213cc1f3658e04df1d3581bb8c56e0264ee96e31360f69776ffee45. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb860bb8-b82a-4918-952c-ad9a55683591.json and https://artists.proofprofile.net/proofs/artist/eb860bb8-b82a-4918-952c-ad9a55683591.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 0x5125076da0ba635921cc73c152c2ac57b089f3e8204c44ac6bba544737ef93e6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:31:51Z), 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/TCAEQ2001824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c3a1d634ceb71cfc94d055e664dbb0f6820263f5215678182ce86a99dae777. 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/TCAEX2019873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dab2c4e2a695984b9c4267291e7f5f85e95f0c08c9d7aa1cc69be54e1a78ef. 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/TCAFE2005041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef91022b438a0ae61054bf4c5dbb178b0b859019eaca27fc9715e7d95dc1e318. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFJ2175740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74287d9b7c1d7c7659d8ffb4a344ab3df0662295b1cc9c5c4c87bc9079e8340d. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/TCAFL2139720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7f9660e09da187348d5387880d5a5f5315d69efe90ba22181c286158400e98. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/TCAFS2166716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa55a82b819ceb39002f055beacbf8854775e798b1ecbe4314559a52d7d8365. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:32:45Z), 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/TCAFT2190244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e05f461d9e8636166eafb5260ee522fb99d62abc77935c7109b75fe4bc1da0. 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/TCAFW2127851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dab2c4e2a695984b9c4267291e7f5f85e95f0c08c9d7aa1cc69be54e1a78ef. 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/TCAFE2005041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa55a82b819ceb39002f055beacbf8854775e798b1ecbe4314559a52d7d8365. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAFT2190244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd384d023ce65c6969266b6a3826f2bbc736c43acff4397a2aefb13d1eb4b2cfe. 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/TCAFX2116284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb35e41736b602abc32e34fd2b43e04dc59a630fd35c10118a57809b261c125. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAGC2260600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f2063a52e37346acf122d7e63b2be042e866792ab6f77caf00bc8bc904d224. 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/TCAGC2260602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6412659a15d445fdf0df3f085336c3bfdb4e3d63407a9e16acde9d0326ddf8. 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/GXD7V2233531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb3a1b6cf217ea60f27fbfb9e79926b89af7ee2fe77a607e56fcf93b4a61d0c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:59:19Z), 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/GXD7V2254524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb3a1b6cf217ea60f27fbfb9e79926b89af7ee2fe77a607e56fcf93b4a61d0c. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:32Z), 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/GXD7V2254524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6412659a15d445fdf0df3f085336c3bfdb4e3d63407a9e16acde9d0326ddf8. 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/GXD7V2233531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a60f73fd0156badb0212ac831e2b1f99f97f0cdb0407522fa8cd8aa962aea61. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SGW502213071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe59a39fc6ede7e4be685cb4626f8372179d3faa69573e6fc0f570145ec8a35. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SGW502222827.