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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84384cbdc942e7109c8b142ff7ec0deec08552bffc14ff4abd91430f4af6efe. 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/45042e99-929f-4f71-9b03-812549ca8c8e.json and https://artists.proofprofile.net/proofs/artist/45042e99-929f-4f71-9b03-812549ca8c8e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f8dcffbe397f747c3b7ea0133d14fc0b86b37c57c9456961b7211ea4be276. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/TCAIR2443027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e0affde7d6162c152ba724a2ac4cad8209f1cb46ca7c6d4153abc40928586. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIR2443031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e6a468aca7862a5dfb3e9b1a688f752c467e90285a5af521ccfcf1158cf029. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIR2443034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c374543ff6104a42be45a5deb33a2af49b1248eb54202b6837daf319490da7f. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/TCAIS2443040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044c11258f62268c0417f42de55e6097d12e329b85d38d61b6b0cd4479dc7f41. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/TCAIR2443043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736ce09f2ed7a5f2f7f7c2f049ac3d10e790e67a14125441583259304b00569c. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIS2443045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9bd5bae03e69f7f749d81ed013bda3ea0327747cf4b128fa605e82d32473a9. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/TCAIR2443050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2760f3fe931262f27aa89a0b1a174ebf66efbf9b36c9714b4a4767d9fb4049. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/TCAIS2443053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde63ab419124e9d0a3ef176885c0c92588b9f2536904221c3e07567b4dff4668. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAIS2443056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8044768724fdb4b30b6ee57bc32aa8c9444cb0508ac2cfdd3865d0c530ba0e. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIS2443058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64dc28b745ba5cf61fc078dcc54b84b3c61dbf254a9d26e0dc5867207eb8f36. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIS2443063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bf3d2a1016571482604caa89e5f92d4bfbaaab85a5e0243b54f9b1ca794087. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIR2443066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e320328bda6be31833fff38a60983e029f378b1a98f83f6a2b9fbd2c49600. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIR2443068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04065a78286f1e593a442c0e079b099e8f0e643ef93712b8645a6506c054e868. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/TCAJF2594113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7950cdeb26f3983f8e093814ab6c04ed268b4a38fe4a6aba411bcd8133d98827. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2594134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607ecf29e8308f2b7b3ef36b57b3ae0993f8126b231a9b56371b617b3c838e9a. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/TCAJF2594145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df4f1d04841936091b41af66eba26fa6e87b4b9822c6ce524dfd7057c57078. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/TCAJF2594153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e310e45633aee1533324c35bf37a1a014d38c4215929efbbe8845d3857be8c4. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2594162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9af7b9d324f4c4436531000680de911bc18e13f5bbd0bcea1f0726dc8df4993. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2594176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6fdcbaf729429e8d9f47c36e634a94b455b77f8e775ddf5539724ae9725ca0. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2594185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fa62a01335adcb0e5fc3f19fc5fbbee18dc91cb4598a995efe715d78254421. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/TCAJF2594195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ea2c1a08ceb3cf630b30a23de3f8e07ba1772a5bc7bbd4108fda2303e95516. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/TCAJF2594203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1279e3cbf1f4186172bb348f00ef9a3128081ebc9f7e54bd5e3e2fdaf3401456. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/TCAJF2594210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ff1052a0410183251b917f061bafbc49a9511631244177cd3e80da60957b8. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2594214.