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 0x2d513585aa946834d459ddf302cffd8d56c820221d3b9a8d78e0e036342b4d7d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf9c41db-2157-4dae-8106-a5089335241a.json and https://artists.proofprofile.net/proofs/artist/cf9c41db-2157-4dae-8106-a5089335241a.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 0x994e07bb2cdba9d12c563f534c3bf17fc70e3e35a6baf0d8e2bd6287bb501d29. 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/US7VG2225058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95e0bf1024469f1cca82c4e86130b023ba73fa7f55a29cc24769fe076d9075. 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/USA2P2225140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63d3a7f3527763f127b27fdeaeeaea5d7af4267ef4e5d07d8752118a53c4fda. 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/SE6A92149737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4f10098cb2a12e3791677a666accc3b88ddb72686e5f6f0568ef7525e1145e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2317704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d93bdb327a062844003f3858324174209890969308ae0633d75e651bd86bf7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6I32338636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b093ebdd1b4be5ad9445db7b1ed121e8a78d97fd0d7846cd32eed6337a3772. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6I32338637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff430548af6b289c6341a42bcf10e577fee4c2f5e8f4d9822e21b0fe3f76aa1. 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/SE6I32338640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849612258e5f570dd0b05596bda4b2261a1c7581ed627323e89234b3884216d4. 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/SE6I32338641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667402791739c75988a60abf550c751bd05e84ac993cb9d9ed8f7bcfdba29adf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6I32338642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b5df9d87f3c4d562f355e5960e602cdb8a81b8de02e1492567429b541e8f59. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE6I32338638.
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 0xc4a314a4eea51f84be54681ea206b60573d016ce2754aba7282075f6c0f662f6. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/SE6I32338639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86084f0e0f6af505695009c54e6eb1e6eb39dd62ea84d7fb18f270fa1403ee7d. 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/SE6XY2539749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0d55ef18c57adf376899a93395a7e52ac9451c8b87c2186cab3561063211e1. 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/USY242470263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3539f3376739fe8de018c4a4d20becac6d60f80e6e2dca1f009b698cb2eaf371. 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/SE6SA2440309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b68804b397a0789d126e65df91f9b2c81460f7f3a03c20bada489900bd50fa. 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/QZW9L2346379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94012790a830459b4f96b56b615de894e0ec33d58aa43252d493b305f8656848. 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/TCAFX2124920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe146b894d255d00de8aaebc7233af8bb7310972774eea3ad298db68303c93. 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/CA5KR2202561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fde4b4a6afe46a9a22997031cff888cb7db29b3f06a329bb91fcdac265b0307. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMZ92125151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a050ae19bf1e0376296e4be08f90c8b3aee5b4d54d28d8244aec09fcc00506. 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/SE6QE2155409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8a6003c73e41059c0459169676f42c5e7c76f8fd5964f10dfe88cd7833dcbc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJY2043587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4468eba4d706762b913370c0afda839b4ab0f3907359e5780583dc6a38f99f. 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/SE6SA2048918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ba11dc40624b3b8485084b0a8ef29f24395c100bbab1a8deaccb2248c3bfba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ62048687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d26c854001187b3b9ee4dbe686e60389abb574e7a929d08fa265e0a3034d0bc. 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/QZHZ52016674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c086d47f919fd1af5207a69bba65a50a92a431728b7cf5ad2cf2c1d22396af. 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/QZGLM2089398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe607e0a4e530685f6983ca4be3c52ca952ace4124157263fffff4522d6974b9e. 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/US7VG2062306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4af7dc8eb06fcf331587f0513880058cddb0563b6d900e6a614cd2f646e9c1. 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/QZHZ41997746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd842652a6696fc74476048b5b5ef0b4d7f65061d9930bed3576e616c3378968d. 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/QZHZ31986970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa629841736ea9645d0340b161b266c315ae98424060876e51153211ac1129f. 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/QZHZ31934639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacc7aded44d62c08947297fe654490a1a0b33e62aec09e49f4527e1af235e48. 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/CA5KR2088968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f559c9017b520fe5d8ad96965b1785fa6b5e60131d5b7551ecfbd6772ccc6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:59:09Z), 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/USA2P2214394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b403c57b12e54cfc12ed6e1d60d7ce5deef54f3d48fb15e9c6ef137a0aca35. 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/QZGLM1906042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59337794a53116a6820726169e574a18306a9ab65a166ab05d3d804aa2c79d. 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/US7VG1915838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997b5bc9afd8d3970950ddca796e1174320dc48408c96434db2c3edc03a6a97a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ52247353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f1f4c53781d66ddc6754e9fa958ac801dba19a0784286c062d75f95d76a94f. 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/SE5751942724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f84fc26634f4d470e7d36e25a5eb49733f8a38fa12fcaaf97677cc93e1a2594. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/MXUM62400172.