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 0x59ed5f122e322dbff9c4b9836b1f11a57bd94c0b2b3b9f970d14ffae2a19b71d. 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/cccc3e73-55fd-402c-bf00-c5663f644744.json and https://artists.proofprofile.net/proofs/artist/cccc3e73-55fd-402c-bf00-c5663f644744.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 0x1a5f4d350e6133abf23a421645ddd3c34752fedf01985c15ba6a487e78915c87. 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/QZZ7S2420046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9256eb3aa487ccbfebcd5852e6419eae1d51863886feae2a16a669625843ee4a. 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/QZZ7S2435600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd411ff24bce92240ece9d445658d3744206c12767c91405d284f790cbeeb14. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZZ7S2435606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1b1707497764552e18fe17c83d4ce954a6bbbd936aa0e30d702d9cc42365e1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7S2428731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4a50fdbeb5cf9b78dfa220ee0d159eb4890aba7e1e6cf78b5d4bbdc2d465a9. 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/QZZ7S2428736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e8fc979f1f022f82b93b4c2e1d00a1b2dd40556e9bb9676aece4bdb63d349b. 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/QZDA72570588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad282f626711841735cd0434cc8a323c38a20725ddaeeb91d38230d66b6bde95. 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/QZZ7S2433767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95849b7855a8c70f473dc6af31f9aae707375d8ce4451ff1c813cfb07e82cf96. 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/QZZ7S2433768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f870c877388ed3ea347dd0d84b5cbc50059289679e2335bd5b121e3299bc9c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:42:33Z), 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/QZZ7S2433771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff03dcb021bef311a97d8d0068fac7a8d2a087d4e7953b676137c4cebd0fc8f. 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/QZDA72570589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeda8a8bb1f55fcbe9efbf13b20ad6792870db63a0a90410dbddda3ae6de23aa. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:19:41Z), 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/QZZ7S2433772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645f8dfd0fc155c19e0993a10da77aa377070b3835b392c62ea432a56c931e44. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ7S2435599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecbe80e505c42548aaef238045c50455d95335e22fedd17a4959c28fa8391c5. 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/QZZ7S2417268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe98abc8955a47bd062822dcbd8b95e9089b73fce40fb7ca9bc8de9dba971b25. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:11:47Z), 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/QZZ7S2417269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb910478ecd279d0d0b0a575557841429a32387261b7a5d4b571bf74ea907012d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6P2594758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70574609d6c0cc12a80c803f526163e5d4668b2e96b8c6f59fd09ca3f410c1e5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:30:12Z), 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/QZK6P2594759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf823231e7ec141c05e5de5865c4717ed74234958cb023e9805c18d66b4f758ec. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZDA62559065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bfa1e5fe212c0e02f44fdc73c590f494d5db0d26fbe394267246cd4cd27c52. 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/QZZ7S2433769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d90c2dca50bd5421e4577d670f6320f021996913e99fce0804e4877ace12a9. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA72570592.