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 0x3449c483c41144b93bd68b494ef783e90449d74a1671e7f89a1892b033a270a4. 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/d1a0f61d-fa41-4a6b-87b9-519e42e4fb73.json and https://artists.proofprofile.net/proofs/artist/d1a0f61d-fa41-4a6b-87b9-519e42e4fb73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sleeping in the Kitchen (feat. Addison Grace)
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 0x809931ea96af440aa45d9e428fcfca7e0433eaa8e804db2c412f27c62b46ddb5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWP2350396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fd785cf636c6900d11240aed811c0b42ada86c681ed648a31a8c55336d649d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6P2378567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809931ea96af440aa45d9e428fcfca7e0433eaa8e804db2c412f27c62b46ddb5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWP2350396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe933c87420c9b1aea8a78cb004ebba9d0c7f81c6bfd457a7a266ee74c2e1ccd4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2332591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809931ea96af440aa45d9e428fcfca7e0433eaa8e804db2c412f27c62b46ddb5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWP2350396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146d95a2635b50af7ccc6bace5f9036b1e919f8baf5e78a3e75c4654174ec2e9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6F2332592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e6206add076f21339c912bf91634fe95a938d2caebf7e461a31c51dae8a79. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2332593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07afb1c359a4df1b89e013161c0cb16787755fe6d2dc1c5572d10d5828a0a55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2332594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230786744434e4adc9ae410381c98b30cc5b7740080bb48093b1c8c4857d182d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2332595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f39b6230216655d8cee428ff5b1223555b0a5043b7286341192feb016c3ac7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6F2332596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fd785cf636c6900d11240aed811c0b42ada86c681ed648a31a8c55336d649d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6P2378567.
Missing Mr. Cat / The Milk Carton Reprise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd190f94e89162461da2f774dcf335edf1b3a605118413bf3cdfa0d7048656d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6F2332597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea042d5c9561d3a5ea077ef59595bcb8bd202dec888a678894df1e6d83b1a546. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6F2332598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3540c39f445db1b4257e77ce9bfa2107ed3abe08431a1c5b593f4727e8fd5dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6F2332599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2395d03c4b21321f1ab159634eb2c50b70ad8f67a50af2ff0879b1f932594594. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6F2332600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f8235eb8c9955b692232ca8479c3a99d5c03bf7b96b0288bdd3580d03b0e10. 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/QZTAT2376111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ace3e3caa29bfde3d7679d75b52145b9850fdacbd3eb1fd9a778f0d2508b8. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZTAZ2384343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24867245173245e664006e21c1b09f2945be925be29c4b6651c878df8bbb178b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUMV2501619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fa8b6c9341c9d39c14cb615f8318c1736470640857310173e37025429879f7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USUMV2502122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aa7cf68158d0740209d1cc1b301cffe3223024378421cf27ea47fb819aeccb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USUG12505299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c16883a133bc0c117da3074cdfa4280f3ed6330b3a04c128c4c26ae7e950f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMB622301501.