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 0x4e304c534ce9b1409dcfa87211e977e10cc2e65aa3855f8c0a18cf97bdf39a11. 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/fbf5323d-f63e-4921-9f0b-340f97936fe2.json and https://artists.proofprofile.net/proofs/artist/fbf5323d-f63e-4921-9f0b-340f97936fe2.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 0x2c42dd10ae7f7d84d516161eb9d14942dbf776772e4835abcb9a3c9ffd7aaac1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6992197775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a968d8d22492464b2e2c7e6279dc23873225aca1230197d8a7867066c0c7cf. 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/QZHZ62200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673d1511c3a2d2b5f54dbf21f0ff6c1b8c042775d993090e38e9d4bee85e2154. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZNJV2215394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6db248ef027ec01fe879d658f81c51795b6510f782d89a056d9a88a273dccce. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJZ2207295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df282aaef8f4395aa75d981eb32d095b1af152deb0e2b431a57b606ac8f4d61. 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/US7VG2330611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5c253440f346fc92e70b868d0d34d18353a186328808ca10a114442978ee7e. 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/QZNJW2315864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c95298445e87e62aff3d6cb0602d2834b614fb9d1740e08aec610071fdf2f25. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJW2363433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014ea2142e3a84552b85371dad24f416e63a1753d730881274b9aa4ea1c0b71a. 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/QZNJX2341671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4c62c1f31fb96174779d40c34ec482f4f6cd68cc6e9d8757214c11b8511b67. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJZ2385177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2286fa1ed87d4e124a66388c2d66d032f6d394f9ca043f4eb2e66cb174f5a6. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:04:29Z), 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/QZTVM2370009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1af9fd4e7f1db2a5f7b82cbd726dfcdb77ca7cac3f2a068598107cc798f47c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9K2366084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0711cb83dd3bc2e99ace3c917e71eeab9a45b512d12fc2692a65e05c0ea150. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9K2374394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a4b5470526e58337b4456c0914fbcd5ac2763c757dcae3dd4f49a7636d2bd1. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZW9K2304506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0beaf6fe7d94c1855eff7855273ae69f73a5858affd7b50546804844f2d162. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZW9M2320566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445ec928b16ff77e5cb66dc44bd95cd234b6a19ef49f2a48d1f67b215ea70914. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZW9M2320570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7448b2d326614a99569543b599d7a2bc06d890f77ca9baec9f202c00508d30. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZW9M2320572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fff6cf6b1b8b87d4e793d194ea8c112a513375c0f5addf55fc9fe5bf26855f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZW9M2320574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d96d7bcc1fb65a9c4c5c1f8936e1077d91a7c14f21ac86c85c26c32e252e6b. 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/QZMZ92402474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9224492945e9058f726a79198b52f75617d44bcee1a42a76b412cb85e4c6873. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:51Z), 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/QZNJV2461926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e75e8280fef1bf6f662d9fc4af8ec5a8d438f4eca7dfdf505fd13b9bc44a28. 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/QZNJX2435378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c2eeda8e7b32a4a3a61c1d2ff66cd8de91be98173b1532a299b45adec83ea. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:36Z), 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/QZNJX2435366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dd80c822aa4816f5cc66b3243358cef84791d27aecf42ed0b7d2fd2e271cb3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNJZ2429890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1511833c745d3957cb7732a3288ad6a5f49e4246f952de2fcd7d468260b91d4d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/US7VG2308974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd821479047d405780df0d42161dfacd9af318b223b2f8441b1b1b812d6dd9f11. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJZ2329970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3587d730979d45a8103d20e4e814c308397fa639c5929f0a075702fe137d334. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTPX2496690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705b7f3977da1ca6137d1b0b59ad099a671699e581600e7565bcef9ab1ece0f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZW9L2495443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa307d7238ca1ad606e0000eaa33d49306380202496bbe943b26376930991858c. 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/QZW9L2495445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ba9c16770e49b87899e6789de5e0704ee9f8647b30c7097a0979f80d172cca. 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/QZNJY2306223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed52dd2ba6a88fbb822ee50f5880c68b4f8ba54f76aa4f7ee4ad6d435071cd3a. 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/QZNJY2306234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cdd05e3616894b5a95b1adf65042dbe21517fac31aba4d2f19f46231c05ece. 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/QZNJV2399567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a90093a646f2ec55172380bf3dc08942bd534d4b03e5f49b0a66e05113c215c. 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/QMBZ92354985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3306d573d08dd815ca5b04e363a5a66e8a5ba600f202acb5f877b9d748f47f. 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/QZGLM2397462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf108e82f9d2838e0160a087c2fbb5ec340900343eabe294a07a26e8ec087ab16. 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/QZGLM2348576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e868ae55d6277c6a6da829d38678924967e465146856ae9819c702a687234eb. 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/QZW9K2370558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea045d52dfd3c9d6b753a653d17275a846272f1d7bf46c21db71eb24881a773. 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/QZNJX2375415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d1b1f5db5bbfac80f5a4ad73429a77bf5dc0834e1b1f7ae1aeaea88e2e768f. 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/QZNJY2366361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb561398067400669d6fdc1ba6c9215f84c0a3362804ec4f2bd375917006f5f28. 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/QZNJV2332563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208fef710cef1577dce2c8863bc7283c70efff04bd38c42af8362b717a0af233. 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/QZ5AB2333614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4923e3b169e0400fc95c586a54f39e294c46d9537a34b242657a9ad219eefc6a. 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/QZGLS2452943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba6abeec24d8b072a778c42e5374aa595f7ceb85436f5806e371ea82a31db51. 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/QZGLS2349407.