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 0x5ca618f410a60f141f1433c76a130a3fd21f43cdba1bde511bb78734e18ba560. 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/59e0665f-ad05-4d1e-8aa1-fd68e56d1a5c.json and https://artists.proofprofile.net/proofs/artist/59e0665f-ad05-4d1e-8aa1-fd68e56d1a5c.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 0x8971feddd7d8c779d7336fd4ded0444a5b359d5a3ef74a4792b431332d4a82b6. 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/MYUM81505671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5389f7c030da66f8d8ce8658227de4a9995e744c0eded608428b9513c408311. 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/MYUM81505672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd501d00091e4b35d55a37f643ec8e1dcdec648251b571192e118537d909d4c90. 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/MYUM81505673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f2b14e712298a553849592779ff4ab0ffc49154f26fd0ca9e41baab34fd969. 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/MYUM81505674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b88c8250e252d3a22f8b38470e01be2948d930e34b035f78f7764d61716184. 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/MYUM81505670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd737ab79196b7f963dc162d4394ffd5cf211bc68ee7e440deb27541cf088a65. 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/MYUM81505675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7c5642eccceefef9f863e35ca290e065f52689cbce7f2a7109dac496466ac1. 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/MYUM81505676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0536eac3371c5b8c275260193d66e7452b57f5f8e3fd0b11c5beb772c04ffeb1. 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/MYUM81505677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662879bb2ce887105e7e38978540ee524ff0af77778b6687b295d6cabd0be627. 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/MYUM81505678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cbb907ee642f0d698008be74fa95c866f6f305903b44e450bd74a21ba0781e. 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/MYUM81505679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c605ef5d0e744accd853508c6c1c6f66f60918dd2caee74bf49a767cb855361. 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/MYPI11201128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bb40ce6e85e4567d1ffb92a3055dca6e48931c0f2c7f6c37fc7da8485ee84b. 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/GBMJG2317932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf87dd65fd3791e664b4c637baf47c71332e84d6e4694ee29f08aadbc510781c. 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/MYRK32310001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa19da85800f718f7394e0745fcb5d5f4b71cfe49724ee7cbce2d1fc25f71c. 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/TCAGT2361810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315f90d2492f4869f82c17409431a06b9130fa985ff91918aaeff18b8bb9653e. 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/MYPI11200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9ef3c58f729909be3781ee4c887090d8a6bb4d54bb3c347e5367b28a93f006. 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/MYPI11200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2a76800e0ef0e3bed1e76a8a00d7083272d674bdb68346cb449aa8b4ca6981. 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/MYPI11200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227d8ff81023c627f75b213995912f75625613d495c3770a0257386d8c4ab778. 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/MYPI11200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e3107363771055f9c081f5c736e4e02c5891872a98b4b0d7f730f81f39c441. 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/MYPI11200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ad1c60befa2859ae0757d769e317ca73f21d629e8f2fefc7b279306e51b193. 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/MYPI11200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870f1d972864d13c3d293069d75c5501a1a7bae632f204eef0024ec72f8ce12b. 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/AEA0D1985645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d96230dac35b424487c1eb49d83d0c6579c4625981b50c90f44abf3dcb033c. 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/MYUM81907162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819aaa6ad3f3cac99b4936d39c6c5c44caeba64fd40fd7e9f7a0efd7e73cc62b. 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/MYIB11600707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe633e7cac47d050f60b9068f9e859016c5ea389cb7fed0bbaa6604cf07d00709. 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/MYUM81506723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b087bd39179f4fe1f2b8066f699d03f9361c46e60dc6c5db90890d395e819b3. 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/AEA0Q2174343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfcfbedfea3121af220dde995bde09781ac9bc437da45df863361a508ca7ae2. 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/TCAGU2323438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b4307459470b1a19f2b494aff424f11b5fa012a39fd282d58f7642834644e. 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/TCAGU2323455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c8992acea54f25c2b5c6cfefc471d4ee2d72eb071193c06a5f6393d67a5a91. 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/TCAGU2323469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93570ae00c3d2ffbb5a98a277bc1c8af575132f5e5a20c959318a546bd0cd01. 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/TCAGU2323504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad3c6dd8f000d488568f13bb603b79f677752a200924926caca4dc9b30c5747. 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/TCAGU2323547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e8a703bcb997dbd33503af52543c750f3538ac97d0e137df23885774e5e020. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAGU2323568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007aa22eee291ae793e8c97fdaeb9c77c7a06b03045abf80cba05f39595199a7. 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/TCAGU2323679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a8fc3016bf09a226773be09630c7f3c24ff0dc3ee256a013f88df559148af. 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/MYBV11600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443fec3dbd18e4ed6a32377bf8ae5ab5c8b94eb6d0ee67649d9dd22c02a3b11c. 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/MYKV11700093.