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 0x0f29b7d73885974b78f8c17b36c64a1d79964f0e5bdd73da80bc57baa1c944f5. 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/4e689765-2691-4018-918b-90e3fd695380.json and https://artists.proofprofile.net/proofs/artist/4e689765-2691-4018-918b-90e3fd695380.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 0x3215ddb9a136d1406e548ceda6ca29a1e4c7f9f985053d379a3ccc4a852af743. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:28Z), 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/ISA110804602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4005f0e947496c569592f3d5547b5efbda500667f3fabc99775d18d5486482ef. 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/ISA110804609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8812d7a0ef2b0dc5e6f80c556daa8b95b66b73b0fd3deca90a316a7daba7aa14. 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/ISA110804610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd933e7f6188cc41b57aa1e99eaf5b415ce942c9bb6920c48609a7f69e4c2897e. 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/ISA110804612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29df78a9e8c3fd15168c4e9b9363b0ff4b72214d54455219f39896cdc9dc2b35. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:04:01Z), 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/ISA110804613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856612b398bab308757e4e8735b01573e0cba4106c99de0d7e7eb5dade5d05fc. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ISA110804614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31597e7be105357960f7e80a45eba4c92c231df3d9a94a6bda53c8c464b32812. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ISA111002806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c80381ca46cdc6ebcbc77913f4dcb17c425c9974cbab4a7be8fab7ba73439b9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ISA111002808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dbfd59b9e12c7b689f63c985e3cae076b18e6021ee3be735c8caaa7b233156. 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/ISA111002809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7351e53681725186ff2dc199a8151e2cc4e795ddce2ab09f2eb67d3f5e82af47. 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/ISA111002811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019ef04bbb861daa1c35142cdbe5023b2870094e1d16eb8555e29a6274c23635. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ISA111002812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d6f5147b7d15bdd3392bebc5bcfb72216ed365825d9ea41a4a71dc4c260bc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ISA111103202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165edb13c6e565fe8a0db44beb57544d149ef8d8fa1addeb7772bbae0f150bae. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ISA111103204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a3ff183c6a4d62fe4ed7ce6dd60e928f5fc66ce6dbfd9663047936933ec12a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:24:00Z), 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/ISA111103206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ef67c13d5facfb5f82f8436bb0cb18066d80cc8b2cc6905def7ed21e4249b. 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/ISA111103207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d8be236755bf7227ffdbd64513d7b97d91f6e732d5d9927c487e4ac84c4f72. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ISA111103210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe18b103b23592e26562a53c2e9f7bfb7226bdd9488d7aa9e4d1b1c6dfbd5c0. 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/ISA111201702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2682fa845a79cacdb0a966c3d9e8d074ce35dc9f79609636826d3a3eebdcd1c3. 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/ISA111201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66f4685615729094bc185dc1f4161f57e70fdce04242268f7fd77472d97c773. 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/ISA111201704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d909f3ab316a57a832e827731a9cb1a9e4af67ac0fc757700845cdcda6978e3. 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/ISA111201706.