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 0x70343b402800b3a5d87a0e19bce6919bbac490df1a7776807e33dd933ffba447. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d029e839-c163-4cdc-942e-7e8a01b789b7.json and https://artists.proofprofile.net/proofs/artist/d029e839-c163-4cdc-942e-7e8a01b789b7.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 0xb914b919a5356f6dccb87e44084605f2f09c3b6bf539d77c82c1e6fa846bdf82. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6080981602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6529aff591ef570bd6384a4da1b2689106256d40b52ee8fba2d839204c73c0d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES6080981603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4658cadd55f36264b58671e4a840a110b2c3f1b94833094e6dd6dc2330dc2b1. 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/ES6080981605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf74a93ac7e12abc8bbc8da988a5816c81d5214d066832002adf0f3c7f08485e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES6080981607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ee71165f131ac1c97305dcff8458a21111abe1bd5645e4a90b0bfffcff911. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES6080981609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56794c96560d503baf16a9b250bdc055bc70314328f508cb710f7e3a4f91c2e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6080981610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a454e8985d9d05e669d99426906d93840364c7a6b5acc7d0f4feb3fef0052. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES6080981614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc80e43b2a90c3c054e3c8bc01d1867adcce06831b40423c77383c6284819b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES6080981615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde6b0694581e971a9f938afed06562cd696bfe89fd516ac93bdbe8b2f6eeacb. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ES6080981601.
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 0xe63c010f33cbb485d4a6bdcb2213651f96746686daac583db52f15f28ef140ba. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/ES6080981604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe78ac959b16d0afc2c128062a9fd67aa91368b60824e7be358cdf31bb696e1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES6080981606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84e747750fe787b13039e4a6af83a9dc07b645fff2b8814648b1cfebccb0ae1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES6080981608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b894edffbdf68975e6755f6e6181e896fe4148948799a12a8a1cd3682ec2e9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES6080981611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccab0e63466a48a139f24aeeb4e06faad04b1c7c3f458c38db64f88710546b9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES6080981612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fccf7defc243afa7793af566f4cd9a3123628db4f393854ad497aac1b5212df. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES6080981613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954510d230684928a4d6de4c5f490d04f53d665c2f4533912c986c34b95867fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G1600896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd8098c5b18ce05a5d1c3879011379bfb8ca6c0978b25ec7357da758c5fde93. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1600897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41889fe15b34e7ebfbb73c1f053d9540376e9e1e3832f859112b27bfea57045d. 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/ES71G1600898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4986673d73deec8aa9a1262454bd9c876e48045cdf8f85c98d0c93bf891c4300. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1600900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf88fe6b680397337ee4a18867946343e0894a1abe651c9b1f35033c7f038db. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1600902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f27fdceb960e77b5cf7c403db70dad1d173c8ffda11eb62a80b94a1baca2b82. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1600904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af9a4616b1b0a9ab3debdcb42e08bae6b13412cbc1aabf7b949f9c2ea2a42f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G1600906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00d20f5c96672bd7fe0bb455eb67984813bb951c3b6620522c620ba0e50c86c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES71G1600892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef989440688481ef702c69ecb893db376f9f640da96fec41b162637eece1a1. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/ES71G1600893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b01b1ddcbfd09969cbe4ef0a4afa2490baf009d9bf56e447024bad0710d8e47. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES71G1600894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aa44d79bc7c09c1e4d54809a7b501ef7df2bc1e4d077b6e9a98867c7333ea6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ES71G1600895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5742e9df0bf5a1e157de4cb95ed0df030161a10d4f89645838082f680ae2cd. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/ES71G1600901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0793b206a5e86ccc4376ac093aaf80ab62545dad385fc4e636c62e38f4b8c09d. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ES71G1600903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c1cc0dc5e7fd76428e8330844fe8d7229bfdb7eebf11f5d7d45226aa063d3d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES71G1600905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03895887b30f35fabf69f9fc0f290e4ea662a7398146d6a1288358644dbd80d0. 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/ES71G2060315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59e3a5720511735b8cfeb1c8b2372ff9d0eab9f54c76acafedc70e134f7e063. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G1836867.