Brooklyn is the most populous of the five boroughs of New York City, coextensive with Kings County, in the U.S. state of New York. Located at the westernmost end of Long Island and formerly an indepen
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 0xa43f1f52321f8df0cfdeddca147f7d2fc9ed6fde5f94f0557210a8f413c05d95. 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/134a4cf0-38a1-4bda-be10-8990b0fed1bc.json and https://artists.proofprofile.net/proofs/artist/134a4cf0-38a1-4bda-be10-8990b0fed1bc.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 0xe45cf3cc240f18033cec26132146835884b7c678868ba9de28cef0e303c08091. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABH1287829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2166c28d9abd5e7de289023015680521ced781b7c160644424d44693023372c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABH1287833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93c77c261b21558a6268cf5dfcb239c1189a2eeb16682f18e8f0108f325cef9. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCABH1287837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa792b7f1c4b95875d065fa231b457f54b2af1006fd6c82e19246758124f576d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCABH1287845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915668501ece4e8919a11c425433b02fe8dc12c3ab6efc726111b7bf47046eb3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:18Z), 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/TCABH1287850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d68f5c18704aff97dd24669c4090fb7a3523412ed843647bb5a6843da01133. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCABM1389078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69145759436c227fb258faddf7672ff303b4831e4365d47a05a7ff3adc07b04. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:31Z), 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/TCABM1389101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ad624ac018983b14c49fef50d7a068627f6b4af4f8eb97c3f067cccec9ebed. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:21:04Z), 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/TCABM1389107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6462aa68a0c899465b7f3599e77a30e41fbb10abb27a37c89512a4a12f8296ed. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:31Z), 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/TCABM1389112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a42f23869b3c3d0518413f923d96f4428e1abf14605640344b520e65b3ae8e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCABO1326454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544b83424496b75a328b34c9185753ce05e0a7209a7011b14d103c163190987d. 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/TCACN1604201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f991c96db073f2fea51e46aa6716d3214eaec31c763c97878f272eaa6297c6. 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/TCACN1604204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540c80697eb90eeba3aadf0b8aae0a2857e9da4f45787303c42c03581df33b53. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCACN1604192.
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 0x02f7d48f41eee9cdaf9760810b0a03d3258d030c97fe6d45c54b1a95add1495a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCACN1604195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e816f15641f7e9f72ef690e00524b12b0d8d6be67c39590977e87f33e8135eb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCACN1604199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c87fc99ccafe82b439ed8d3db60197e66acba0ace510931e120ab84ac386b3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCACN1604206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20109e5b9e9409ce9fd8fe29d91e5258b39335933cfb62cd7d47fc2214265ebb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCACN1604209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b93223db844cc765bc4e33ec0000699443fb1fd641a6ad3d4a0014cf699196f. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCACN1604213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d518d8f571009d81483425e7dea67fd1b9e6f17fde739aaeb90c1fac21dc32d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCACN1604216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8085d660fb4ccee6a9ef064dc010622cff482cd3eb3a717de1cfcfc825fff69b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCACN1604217.