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 0xb47c3c6dda1aa74e66b4d007f9183c962192b84da43bb1c5d43370e0eecc6e86. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5704580-910b-4f66-841f-1886335cdc85.json and https://artists.proofprofile.net/proofs/artist/a5704580-910b-4f66-841f-1886335cdc85.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 0xd3a2d490a1c4ef6d4cd3e14b91f89882675e1e2938b219b5639aba33fe281b01. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNWZ2091624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca617c3278943831e61ea936e0372f891f37f7ce0ad4e9c738cca195963c267c. 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/QZNWZ2091625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e04126326d2444df8d7559060b713b3c80e8f635d2283f25aa489f91a304fca. 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/QZNWZ2091628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dd44baa3c9d418c285c7269f14656929c56a86db97463356867d2061556a34. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNWZ2091626.
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 0xa0ebe577d7898cdfce46be1fa1fbdfe3b623535526bcde2c01f3e2820dfda69e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:08:46Z), 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/QZES62167581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42e3b2d9cae96f9292d45a5866a2c2a61e6a7a14024810e8c59abe5e37ec68e. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZES62167582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b359fc023dd4cc055f96f1291ccbef0960611a789d1e8ba776e196502642f. 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/QZES62167583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9b70b72e7ebc70d3e0d0b16d945612f1e97840c83db4be977e27f42d1135bf. 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/QZES62167589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a507d8d85f5b1503163e98a8dffd3a68d6872387967bdadc82823a7ac4b9132. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:21:36Z), 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/QZES62167591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0ea919cfbe9253033588d897313b03aea0764982393391218d23180b8c55ae. 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/QZES62167594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b89f05ee308a2d0b2ad1fb9c07f5cf79ea77f97ea5b165c954dc4ed3b53bfd2. 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/QZES62167585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54494fb5dacd19b155aaf4b8452b05dcb42f07aa678c379943f6c202e98f5d60. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZES62167586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9f6f5f7db8f4b7e54c1ea8b515541f21b0384d517b0ad3ce58324525093d71. 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/QZES62167587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f46447d898371a7bbc408df94cec55534e31fc3be02f02d92e0fd1821bd907. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/QZES62167588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aec7eda53b07817f31f6a1ec6f99cd920072af8ae0268285cf6afbd315246f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZES62167590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14818a56989122e0a49e9b9898ca4e67cdc15a0b521836300caceda7c4e2dd3a. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZES62167592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a151848f9f6c93b8835ad0484b3f6af9fa88dca3cfc0dba5c8e47f4fe174f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZES62167593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3ab32cd41275f21e81caebaa05b5315d432afc215fc0e689711864fec7342. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZES62167595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409931bc269d87e7cb021ceff40ec375fa8a70d1dd569ce4c659490beb98f23c. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZES62167596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ec19bde9ea2490caadc21e4e8ef7fa80d7d721b79649d0d6c7ac212d8c3dc3. 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/QZES62167597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de32a4b3354b587c01e2319285b33664a89a4b11ffc1282f544b8af95df8d33. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN42170304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087e59dcbe7800fc92fd7d902f67d9ba7183edcfe5a4830b0e395fb7fdc0161c. 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/QZHN42170305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f09e2f594b54094d45650620fd2a1d18ba95d1d6cb8aef67938bd73c77fb47c. 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/QZHN42170306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544eeff2fae58c6de74113de7399c82515a07d07710f2afc752a08fc8264ee18. 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/QZHN42170307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5756955a1c44a2c45077f9d585698a7153ebbeb4115e1edcf479412ec2f0c519. 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/QZHN42170310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde90c773d24720580cf4303b667485310c9b14913c8c5a5683428d148969efe3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZHN42170311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4385547a7aabdb7346499a2bcc0ecbeeac867c74dcb4d0dd75724fe3a929062b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN42170312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1e107e3c7598ee9fbdc9422e288f34e3ec92c5cceb32b61f17ef912bc01a1d. 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/QZHN42170313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0061ed35e21ee00e74465bcce028ed7c9de54993f53dc9a19c6963dfd74c138a. 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/QZHN42170316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635a0016b901107868df359a4a90514219834855a821db47e3d487b241b13353. 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/QZHN42170317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e3a7f35c6958b0ec707eb00f981e94e0737578ee419289ef6251ae9ecc43f8. 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/QZHN42170318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fa4376a76c1f3480779bade5cfd3d7e470ae9aa51c3c96060a2690ba12d71c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN42170308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a92a855c23e23c2db3565fe74665a43da669b97c49238c97d1ab5af0015b7f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHN42170309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7748498cafb2ddbab7dfd6f2a361d0a7a8285476c9970d4678cbb4e0ed9a29. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN42170314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcff27ae55836bc743d68d443d4a48bbb1077a7d979df327fb1173ac9f5876d5. 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/QZHN42170319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aad2882b1d915bdd2b254795109ec54a04e2ea28f650fff0e0f259e5a322fa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN42170321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b40c62a25d12b4cf2779d8d62b62dc7ee54c9b503962f0b81caeec7f6e6850. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZHN42170322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf546b84f5c4a53cdaeea64c83fd010fa2d389c86601a07df36c15a7bc290dae. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHN42170323.