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 0xdce99c2f9aea2e6216333f4cd8b503c2a50ae240cdc625f37b39b010d71560ce. 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/d710f1c7-9254-446d-aa64-6ff4b0f622a8.json and https://artists.proofprofile.net/proofs/artist/d710f1c7-9254-446d-aa64-6ff4b0f622a8.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 0x3f63e7d63168b88e20dad8149d9d7d17017627f4522a480fec9636107306a899. 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/US3DF2463454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ebcb94b3f8cd97fb5add1018145781948ed03dc860c88a1a81ceefc68e8f67. 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/US3DF2463282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfba48f7209371c67bc071bf3a5654199313d8273d737c1e8c49ed5a221c504. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US3DF2463453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a7fd33aae0a0965dc0a374a29a14e3ab7fa6b662d4957f1d584a89aa9a0df5. 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/US3DF2463301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9f3fa3e31e6a4cd88ab2ece3626004d8f43bc71698a4b026b21b99a75713d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US3DF2463292.
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 0x99eeed6a3925ccd96e35dd253ecbe575d004c4379e56d4811310cdb3c649a0d5. 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/USANG2413006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d223a581aaf5428b6229083cdbacd4b96e97b224cbf07cf75c077d253ce045. 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/USANG2413008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47a6fecb84fd78928b8b0f01dced889e4bffa4d8ed415e7db28d47e5f598ce. 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/USANG2413009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07df4c2ee7aa6222927079d18269924cd042a751a66241233390bc8f293fa3af. 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/USANG2413010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56ab3535430b81e7e5d3a6262d583835a7bf9339d65668711e75bdb2fa453da. 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/USANG2413011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2a14fb1b025bc214592ccc4fe12ae65b6e09b6ec50870606f1a543fecbda55. 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/USANG2413012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d65aefaa13e20314a90f6df6d1c56ee33178901c665b78aefaaf6decaa7419. 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/USANG2413013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512393ae50b9575bd7c9b1e480e3f1175fd6af49b32c3a5dfd823d3e52fe4849. 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/QZHN32458263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8af9e08f28858b9ee912a7d5e83a57c85ae6624bb7b3fc09322b3a48c529dc. 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/QZHN32458265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a986b934e0dbe6f1cb2f77071165e5ac82cc8440bf0df49c59586cafd940f0. 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/QMANG2424105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3273de226f4f8154f9b7121fe7e3d8d506b5d803a4e2d583130e89e67588d3fd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:29:40Z), 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/QMANG2409267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60837acc0bd33c04b31258cc0d34289d98298df4b1e4edc2ab5e967c4bd3d28. 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/USANG2445701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7c079f0b58cf7ba447aa30660a02edcc8f913b113a9d1b202c0e218654fae5. 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/USANG2470188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c4e65742e59788cd8530f2eb5cd0844c437df63206a3e3429f0ee990007b93. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKZGC2400392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0974c2d7472025e376b35683fd0fed7c421ff24a01bcb61bfa5813fecbc171. 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/UKZGC2400394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22afa22963d893b6f3821c022e1d297f1db4621746fcf640277506c06492b774. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/UKZGC2400393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad5213ad9d76cdec260942d0fbaddc9cfc57ac0ca0cfe337224b4d6357866f2. 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/QMANG2224953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc447ad500f4a7527377d6ee39fb9617c0f52148d7877a747064dabdcc7277. 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/QMANG2224962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171069ae5716bc9443ac8390628dfa4af3eaa588d68cffc1d584ef6b6cf2380b. 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/QMANG2224973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f715b4423559c0c9646b2fea95d4c9702c61769ee903b1bf0e09cf6ddd9d868. 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/QMANG2224976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec28f6cda62839db928077bea7681083fd62ce96cfc57bfb3eabbd3cbd097a76. 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/QMANG2224979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e77e165a6fd0fe40ae5d04f34eeffc079bb2470bc740b97c0441a06f15a0d0. 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/QMANG2224990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccb7313a34584f0d9fb28c37f59b8aab7c056075c33aecea414f2760326a69d. 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/UKZGC2408493.