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 0xbe8d3168ef9db9a298a149e729bc803502f318164cb26ccebe1ac2b58128651d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2360a51-209e-446a-982c-a1cc357fd70a.json and https://artists.proofprofile.net/proofs/artist/d2360a51-209e-446a-982c-a1cc357fd70a.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 0x8cad1038397ecf62fe2f05eeb04633e279cfe6e10ebb75bd24873fc3b996b55e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QM4TX2214949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80acd96ef2bc662da9a30a5d7165a266fe79c3a428c19ddfdb9388cb2925967. 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/QM4TX2214823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b58724e8c443741853e66f94f4254a666f2d3710da861654e5c2fd9f6ea6aaa. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CH6541675112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab235a7962c0fb0e845aaf1ca6aa9f948a879e581a7eaa74254a09c45c2d5ea. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CH6541675063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7b36f3aefbdd6f6d1e8017e4573117fed85e2eac9f2de17a5b82ab6288c653. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:25:11Z), 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/CH6541675026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975efb2f4e5f2c4569e86eebbbefbf7116d39fc2fda059adc026a3f3a70798f1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:09Z), 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/CH6541675023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a518da8adb22de89b7cc642c4a82a309869bac2d4c47173f8c296715d0c470. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH6541675160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8ef11fcfd7ec219edd44b6c6875ff60dc20b0efaf8eadc082d9a7ad730fff8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CH6541675020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566fb2ff6932089e1a0635763a9ec893b00fd1c69d09333ed12dbf450493edde. 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/CH6541675179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4476800d2ded6efc02a31cbe5a84d633e0dc3b38b718c4274258cbdbefba9c24. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:23:57Z), 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/FR10S2189807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c081c4dba845507914d4332a4a1ddfd477d21bffc9c4eb4deef936e9964f9d3. 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/FR10S2189808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf4f37a9744f5fe6721ebbe10dadee8f16b5f8dcb23aa438a1280fa282baa4a. 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/FR10S2189809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24016d7655d9bce734fc71b9305ed0781414d53117bda739fc8c9201eca0bb20. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZWFH2381302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994977380a39b985e42a61e08cea5af4aa623a998fe06dfd4c00af36b03e9edc. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZWFH2381304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f6a166fb84311cd713a2627e83369c505922371e811f5990c412fc0ccc89bf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWFH2381305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01edf6df12769f0f898afb723c1e92ed7186f6aa70ae1cee13e0f486a2c9d1a1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZWFH2381307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf255c0a8e2daa2f81e430be262a1136ace48e65b426b404e59faff6aa5b2135. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAS2589276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef3ca513196f7e4c005416bccdd1ea5d51bf1df9161acb01cd9a72e2540151. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAS2589277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40a548ac7aa751ea55e3e0e50ea6d62b36594db16e6256e7fec1c59d968204c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAS2589279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fddd1d7a01de651d260ff5f9d7cb7d3a3480767e7ca771cfafcef7f75b4590c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAS2589280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5496c4887dcfb886061f28d582ed4cce489278c62c7e682635914762a4c31dee. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTAS2589287.