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 0x90f279eeae4f7369fe25e8ad356195f8531253ff1759288e2c69c40fdf2d31cd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a45cf617-cde3-42c0-85df-cd6fe8572eb0.json and https://artists.proofprofile.net/proofs/artist/a45cf617-cde3-42c0-85df-cd6fe8572eb0.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 0x747c36d27523dca63e62780a72238007152dfab86fdc52c07822282914f86da1. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:40:29Z), 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/QZJG52252778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed95888a09a31b0111fc9a5de28af3b8530b5c35ce1aa1f08e0f77d2a72117e. 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/QZJG52252780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff8509e737c8d43bfe5206ef1698fdc6e200524210d54fe6472f302cb484b56. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZJG52252781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be474cdc0897ff61e9baaa903af234f43893d82061631d2321df29150faafe0. 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/QZJG52252782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c8e76b7fb05695918c4e197fd7ec2bf04fda87fb2a6d6e46976443a276bafa. 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/QZJG52252783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d725c764b5ec3aa761dfc6c00c3c9b526166ba2fb1ae070824443f75078bc33. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZJG52252784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd54c97b856597313aa9f5f5dc109bf21451abc2e43f0ae9a3b4fbac40999ba. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:03:40Z), 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/QZJG52253042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd1b0b49caf64071b2650453a3ba964fa22075d3f5f0431138a6803fb65d19. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZJG52253044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0332b3dea5afa2604408fecb769d5223d25abe1d9998941fa540989f58a8f1f1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZJG52253046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf4526b999ad9142a46974ecbeb7df216a3ce8817ffe4cdc1b3f7a5bee18736. 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/QZJG52253049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecbf618581acc07adba9cf7dd3cf416e817bab65345eb6e6e95087b8204b9dd. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZJG52253050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba62e35d568f0122ac314e8c23981bf61ae2861c2848cab5d6e6fede6da85f78. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:03Z), 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/QZL382211884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6822635e14704c6e63f30941ad4c242623b5343e99b43688416f3400ae1ee8e6. 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/QZL382211886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294f9e6773ee72f93af20193a6478329378ce0a94ab0d735dbf39eca922a337c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZL382211887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb27ec1dfa2144a827901b82477ab1f26a11aeff57aa417bef96135c3c5e1805. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZL382211889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dec168c3ce1e05549b0f9a8e3dd08ab4aefb5875e3d619766500a73e6a6fd4. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:01:01Z), 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/QZL382211892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe575e629c3386c1c0f7e557d60f9a96173b083f1c04971986f7bf57e1b5c84ec. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:43:54Z), 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/QZL382211893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1c5d267ab8c39da1d821239513991fa53f2fe84556f1cfb84cb42de4bf81a4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZJG52253127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e77a4f73e1510446beb7347b2af3d593e62e81e7b1ae8bf786dff0476d0ec5d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZJG52253132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ef189dfbcd4f84494166e84d18ced6b72ad750ee4ce6ee1deeb121c460289c. 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/QZJG52253133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a46d3ecf760553d87a46f417b8321d4079326a3fd2e42224a3ce2fb3e95c2. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZJG52253135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8051527888057201dae34ed42d9899d3322400c71429231d28cefc870b26063c. 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/QZJG52253137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51ef9e26917ec3a381455fc7d5ec131fa3dd3bc71e502d2f9a49a75ce6f2754. 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/QZLL92215568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe367ef27b818f5f1febde076ffb3e25d61b9dc2a00a152aa2f5df7d282887dd6. 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/QZLL92215569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecee59bd9223aab72f2b71f20656c9c81c3889e680e975f3b42b314e615ff817. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZMWW2288973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4721383b2cc255412ba98a93f7250af7dfe2eb283f26180b4c5eeccd8879e1f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:27:26Z), 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/QZJG52252233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f2508e0e581af2e009cb5c35e03258a2dd9d290b2b48cbd5993491633feb9f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNMU2383915.