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 0x828569b7d19736ef7936e44aef2880a62af401221d55d60a9a2eba79b99cc385. 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/a3d86ef5-e8ae-4f86-9f36-715b06a30667.json and https://artists.proofprofile.net/proofs/artist/a3d86ef5-e8ae-4f86-9f36-715b06a30667.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 0x7e575fb2693ab2aee8da3d847e87f71b2c7d69a365002bfcb2e5205d313eaef4. 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/QZNJX2484783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa884ac22933a44bcebce92b12f4d9c1420619d11c85f5fbd66f87c54b4985674. 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/BXG6R2300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c139d9959d92eafea376b26429af432d4e7ac8d54ace9bd10b763b16a277d0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB2309404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087947f67ed131460c84f0cc30a34fe0853067a6d712166e2c30f0faab4ce67c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBB2228183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7ae6d7b3aa7e25f84067d186adfc28526e9e09baf6997cbc24ebf09e5ab700. 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/QZW9L2223297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4f1977416ba966f81e65213da9d29c6c87276d516cd8cddf74d0c8d2c090cb. 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/QZW9K2271089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe184e32ab8a84cfca5d5b1a453a83a8dab82436fee8e39f99e823390b423ba. 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/BCWK42300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8529f2c5f6a967a9f56c4b627ecc0c55bf920e6f2a5adc0c98e83bc78267b7. 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/QZW9K2353464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0231f694639c9ebd5e545fcf0aff85546a28ec2e3e9dda470924eb2f002a9e7f. 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/BX4IU2503750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1004455a61d317273a233f83b85ff6fd4a5a448c20ae8c8eca6efb98f6973461. 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/QZW9K2418760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4c0eba108c5d1895a71a735f7b0a18aec7f3778ae7a98545e1f6f5f368623d. 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/BCIH82402392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaebbf836f82a84c2734648692fb0902eda588cd3614ac31375fc5f18989648. 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/QZZ8B2389139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af8fa679fe4568877b19289a7924850893f3dea71b395d1fdbc035ce8a446ae. 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/BCNWM2100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff82a0f82cd1c68b9e8b02ceeef75a76209d0c7208b8f51cf86a7fec54f14d1. 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/QZW9K2353463.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c4eca2c8e83195a1e8388a790884fa527aa3943df3e9af858367156978470b. 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/QZNJY2312830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a74144a4b369e4f0d9e8d335d190ecc6039a1dc04c6d4ae9f3b14a4aca73790. 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/QZNJX2331971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffdaafb67cfbf7a4495f530691e91c47197eefc0211b3bf9060b1fe0aacd683. 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/QZMZ92372214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c19e9a360a1ed39adbaaa74b8a5573f357f8232da270211f3d438bd43aeec8. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZGLM2312098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030d0648252914a025fef53d39576acfc1d28f1d0661c39ab4b4cb80594b2913. 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/QZ5AB2323023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc769ab85aeaa10592e15b650cbc68f3451676d5e5333f112f25b7a8b4142cccd. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US7VG2380984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83127761c03da6e5b7c80e2a30da49ee8ff9d76b66343aa412501a2f841fbd3a. 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/QZW9M2222882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e878a2997a44f1a1cb68ecece8049a419701e560dac958a41c0b343dd54d9. 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/QZNJY2323906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e451c8ee45bcfadf1a6ca81f318d03ad49f420f1d4b18fc43370721ed6f7547. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJY2323909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20447c358ac26baa869e3b5e7e012852d53a3cea60da237dae72f651a811e2cb. 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/QZNJY2323912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa60eedad15c1bea9adf12c05ccbc5f62dadb9f41f9128411bf7563d5ba70e5. 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/QZNJY2323913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25a1c944ab873fdad1a94875b05355d6b8b3d86f492ee1b93870a98880742df. 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/QZNJY2323914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31bc0098db173b3ce82501ae760eb24bfb7548e03dc4ffe6ccae0fe2fbb197e. 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/QZMZ92315256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe45f27896358318c641a01e793a464b90c1b1010de090e282095035520afaf3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7VG2365685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b0f403720d52f4496bfb355df802d148cecec71e498acdc3245c8e90bc0edd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:02:35Z), 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/QZW9L2249965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7192cceb7afed74a969bf41e4c5e5852c42f6640e186a669ee90359c5686041b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BCNWM2100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7353ccfea735823f06210cdf0b63ee116afb0d32f815b50c57bae4efbf43c4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTPX2262151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ff320d745c6d90813c8e3945b8ef8b6c9590176b303f128a82772f107df208. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BCWK42300022.
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 0xab89794f56944d8be94253d640534b66c2a6c5b1708d71d342499d3e81d8b1f1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWV32310425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd102241096e0927fe73619e94f5af80c2e827c9193c336823a6a785cdf764b5b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BKBBL2200001.