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 0xc3b66bbd084d1462f0f710ad001a2bff1ef95eb85cf46fd92f7f8b9ed2031eb8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e444c6d5-c570-44de-9ec9-5630afe7bcdc.json and https://artists.proofprofile.net/proofs/artist/e444c6d5-c570-44de-9ec9-5630afe7bcdc.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 0x1e628b11c47d49325042cade99c3863120748051c332d3db026d9ab6833cc867. 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/QZMEQ2599548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2997507f0c46bcc4ee30080b5c5f089a13e0730f7f17983b70d324a318b0ec68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:55:29Z), 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/QZMEQ2599549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5db36d8825d03156754383e8fc709fcb1bd9292a3d9c518833e75326d8bafb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEQ2599550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20f4650187145545e41f48d5cb88da30c405a1b24e5c8529c164d64f9d8eb5. 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/QZMEQ2599551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eda4e0180b570be6ecd4a68f588f08b7a57934b8cb0fac5d9754849c4ad915e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMEQ2599552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b838841d1669885e01c0f6c06a19733f4818a82f8f409ef6163249289ebedc8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEQ2599553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2e0dc922fb63758e582b6f1436732dceed55e41c71fac613d80b2c2385b2bb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:31:17Z), 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/QZMEQ2599554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393b8cf12e5b18ff0b7f0159bde40771a1f9fe42aaf25219c0fb4b62af45c36b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:46:32Z), 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/QZMEQ2599555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9025a6387f129ad0e0201542833cfefb9185b8a3084aed6c35295a113f43b036. 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/QZMEQ2599556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18676f698b7b99375e35013db697f5df8bbee4e55355c7869ece2238b76354. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZMEQ2599557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d526e7b86a03a2b915882bdb3b9299a5e7c9a2d2f839f6f8dd0688f0e48cbcb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:42:34Z), 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/QZRP52531718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ee779f652e7424f548f1422badb564693a7d2ec1bbde36baa6b055117691e7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZRP52531719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373242a7d61f436de49c79ccf5631a4b0d3343088a92a7911507945813bdcd79. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:10Z), 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/QZRP52531720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e4314bc79dfe3423313ac86f86cea961534313151c533dcb9bdf3c2dbed73. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZRP52531721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48002cc3b9aff590ce14c525771065a05779244931c1644b850beadbb5a558cf. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZRP52531722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aca56c1abc54b92edb5513e378e902de7c8ba67cdd13f17e72434f0af9b0735. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZRP52531723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b060cf71bc7e3a64c109c5767680d4988b21f00911033fea0adc3c5f8125dd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZRP52531724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7bd79d29ea128bfc76f477a5df0d531c21ed0eda337c13d0e93a20e657fd13. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZRP52531725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea2ecdaab1e74d44de05f0bdf5f50a610eaf5c268c80c4c4ec6e5a947093700. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZRP52531726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49233f133cfa05d6c9948921c8598bedd199a3720cdfba336feb1d73b6eeb8d. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZRP52531727.