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 0xce958d9d03d8ae5c09d7a4ae3e6348477106160942c026d9963e0e8c39f39eaa. 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/a0b7783b-a80f-471b-b149-9f4e59c7641b.json and https://artists.proofprofile.net/proofs/artist/a0b7783b-a80f-471b-b149-9f4e59c7641b.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 0x2b9f17b1fb448c32db433f5ce4925a1009d5311c130bb9d8df407e3347c103da. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6541617306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71c69302db9a5087d4b3ff4db12806c683cfe07182da0c96ffcff60530a95f7. 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/CH6541617307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07f72717f65794d61ce1502cf612897beba81b48856ac1a65e5086d5b674ca4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CH6541617311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9e92e297a967bceda9d4532238800141aeaad0d8428a8358d1b0cd166720c9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6541617312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb269dfc122bfe084fda3b7987d531ad624292f2bd2927e2061551ddda5311803. 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/CH6541617295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f534f1040c99b1ca77fb434f4109b1186b74a031610054ac157d83478c1f4af. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CH6541617297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c2fc8ad8d9029232f8fc199896da8c69951ed2d6c7579bbf51eb71daec15ac. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CH6541617298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb9d1f18879a6dd35e70c169e07ab01727847b13e803dce57e796fab767060c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6541617323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a4de019045df5671a135d7f716080bdec22741a385f41a07c9b60eaef8d974. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CH6541617325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5f17f46171af001590e75847148e5b53ac05ca905774087dd280a8ca830f1e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH6541617326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1b11a22a734f3abcb1a33e316f8982e472a1e50dfd9c2b24bf8e512efcd589. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CH6541617387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330d507253be0276851769e0b4a641d1f4e4e0208a7599657dfe1672a2dbd41a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CH6541617390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485bacb5a407e7abf990a5417f05523c5df60eb62b729111d9afe6d920e82e08. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CH6541617391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf565a2dc5f276fcc0082e9311ecf1a021dbaa5cc355538cd6abce040c28fbecb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CH6541617392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379721dec32fac3cf992f32d8d14a7fd1a3e3724b1d71a46884df388183e05c. 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/CH6541617719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6610638e4845673bd9879f2cae2c2ad00b477a0d7325c17dfdc37145e22f9d. 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/CH6541617722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3510bee5ad51d1740574adcadd0f7aded76961f6f4d7b241950bd3267da900ef. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CH6541617726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd372c4782372ae975568dc4b225ee0561f2734859de8a9e92399316ff2a96186. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CH6541843156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cba0188030375ece878d4629c9b2f5cf1255e4b07972f770a73d8790b15535. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CH6541843158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b60e2191a86117e465d8992153d6cd4265f858ca425b6cc318a625e005028d7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CH6541843159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410860be173ed7982a1400c9b33989e08e3edcb4645bc14ec4bcf9c62304f778. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CH6541865884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782bbe83cee6e417f8781498a99dfb1ea028c9ed021f0f503db44c67714e725. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CH6541865885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4e7838db15d3b0e4a707d95346f970299982e88b05372150a677e974208ae9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH6541865886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d80a93258adddc77974309ded8a5e9e70a82d5cb857727e9e033714f70dc414. 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/CH6541865887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45976a47d7fb83a30bb598c562ea77d41b92aba9b8f15588aa45b48c306eab55. 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/CH6541865888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd250dda2c31cd1394c7235d24469be0eb31b9d92209cb120efba45fae96245. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CH6541865889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb922bb18bf64243455d5c2ca6348bf3094d2d74a0a4605974963c2c1d58c6c49. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/CH6542068070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e21e9abb2fb455f7b4fe599817e2e58cb32985e85ba09049feae64ed6ef45c1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CH6542085747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1675ff88e24a1b9bbeb1141dd6d13157d1795b1e8f9f432b2c3f2e7c76c9732a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CH6542089441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece7ed93609e698f0d6395176b562bb59b279cea4439e3dabe2f8e92c33eff2d. 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/CH6542571384.