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 0xa0bc74005d1de246515f6c953d7726d4ad75588fcba30dd52a7dc13e189996b9. 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/de829626-bc15-4f66-bba5-1e4f2583d7f1.json and https://artists.proofprofile.net/proofs/artist/de829626-bc15-4f66-bba5-1e4f2583d7f1.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 0xed820beb64ffdc0aa99b9e8a3dd987c5ee40b202b1e7d4f1205feffb384191b0. 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/CAN112302126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81820eb54b58795afa4e866d1596713a72804e575b577f869ace57a4605aa52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAN112301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2090f86447464ca2bfa65d6d2cecb742f663f84baa529513d19ce9b6781353. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAN112301500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81820eb54b58795afa4e866d1596713a72804e575b577f869ace57a4605aa52. 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/CAN112301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2090f86447464ca2bfa65d6d2cecb742f663f84baa529513d19ce9b6781353. 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/CAN112301500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a17dfe60fda35f8b8c553307c5796f0b25bec006e7f2e86b6aed13a0582a93e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAN112201097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0564b512c0c667c262b0f18a590dcf48adb97ce7f90b73849da066adce3e3cbe. 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/CAN112301281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8ed77396e5f9d17ab85556372ad0234d9bde9509f24f21cccd22e61e785243. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAN112300898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc20bdf42ab258bb64624215770997448c51341a9ee3067579f64a1a7b276d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAN112300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d20646e1ebea43ca34579c7a870c3604f1d1d49da1e103537c038ad9e2bb8c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAN112300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8ed77396e5f9d17ab85556372ad0234d9bde9509f24f21cccd22e61e785243. 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/CAN112300898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a17dfe60fda35f8b8c553307c5796f0b25bec006e7f2e86b6aed13a0582a93e. 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/CAN112201097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d20646e1ebea43ca34579c7a870c3604f1d1d49da1e103537c038ad9e2bb8c. 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/CAN112300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61981b7de27c60b289981c7bae682454a897f4abe0e98c5f1985ff94f8171d2. 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/CAUM82300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc20bdf42ab258bb64624215770997448c51341a9ee3067579f64a1a7b276d4. 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/CAN112300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a17dfe60fda35f8b8c553307c5796f0b25bec006e7f2e86b6aed13a0582a93e. 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/CAN112201097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07c09d73736ccbc046aae0b4a18deca6c817c02d597b21d45da4d09591ecc06. 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/CAUM82200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b89781fc07a5700e95036ee05a7c806ffd424d828fb1e84e8a5f9a9c059deb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZN882116552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a1ce0d31e5c42064f3e67ad62d0721227920926a383836e54fe9b54ea97ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZJG51978767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb389d0c0502204a60b12357468b86ac1cc4d79ef5ba36ffbeef331c98cd0518. 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/QZJG51919824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b056b825f07bce8d6179356a40fb2c112874f5e08e5d51f92c08048e368d669. 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/QZ85M1995001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96187cf5489d9f24338298be316c85cad43974a8679e2325dff6af250a257d73. 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/QZ85M1946761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf151abb579e43dd02605d83f94abd31e1e0a62aced31e24854bf26d6f6cf3d86. 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/QZ85M1919290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d1c7f770553bd51848002bd17e62d089daec05148319681b303924c1648d2d. 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/USUM71815772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b8b70feb77b6d6003989cadb5d46d14b66f9572a26fa8c4c550b1e04047d4f. 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/USUM71813502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde91999620f81be59f37adf72a9f600d7be4047215a7d9297d80f795ebb8ff69. 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/USUM71815311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45793c97957cab771e8bb7337bdcfb722c0cb08fddb4cfe2094f453d7bac4a3d. 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/USUM71815773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb70499b92b0e8fb0ae37f567c5aa7a329c387d06d1c71d8868cde828dd4655. 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/USUM71810269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcd24fd381042e797c973b50b38ee8536aa6eb054d716b1803b976ec44dd647. 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/USUM71801830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785e06ceee8f1167501691cc928f6ea046d4533be1603cb42207a16ffc44400e. 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/USUM71713413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c690518c704d35f2d73bdc43e3e4a25e2766e4af5d24ef4aebd0a315a891336. 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/USUM71711908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c91106eff31fe65f7d04b7443df0ca2088b33d9284d88f7a6f44ae0f15ab034. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USUM71711912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc499d988bcf37e0c64caab6360f4688f0d7ae763a93841ce2ecc3c1ca3b26953. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USUM71711911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7f6e515e3f54436402b5c17583b3605ee34b936db135988bfb80c0e3dae12a. 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/USUM71709185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8df05b807e4de20f44898366a03a29ceb41b515c3b4f08a3b9e00e8b68dbe5. 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/USUM71708164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f626a985df940daaf13dfab59f0f85736e9974cd6f8c102a84e53d35a34c49. 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/USUM71705666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb0d845f243b111df92765430f81bfe2705f341da188cb5936a8532b831c692. 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/USUM71704248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4838203d3bd35f0be073d1429c1b7f8dcb7fc576f13386f9f5bdfa45d0e4fe4f. 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/TCACR1691216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd965f49f574328d4d9c97e90026d3533a130745e4b094050de91e353423e09f7. 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/UK8E21500403.