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 0xb5d3d00795dc9e1605a31137e1744405cdcf3a6a20759c547efc50309827edb9. 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/0fb03903-a075-405a-8a84-2d2383109190.json and https://artists.proofprofile.net/proofs/artist/0fb03903-a075-405a-8a84-2d2383109190.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 0xf0e910b16c5dac81c75636a32dd30d7e61562b1f0c5b7948ce6687bc3654d98f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UK6KW2100408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf290c2559e0f91e32bc4b0de59ca4a666562affc73ddeb09c5e0d5193c16ede3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZPLS2176698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ebf88da5a1aec8a433271a0cb07413a1ddae02e5dd42955b318b591401805. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTAS2129257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1566c06470a900b03b904509eb99a760ea5dc9675ed22f6167bf2999ab4373. 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/QZTAS2129240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b05022cc1fa806476d64703ec56e1cc2110188f9b3d00da23792819756bcca. 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/QZDA62298800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c6d8ad3e49d9b000634b2d86f0cc9ad864467f345afc829eeb08f67002bbf1. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZDA62298801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95e8b491ae4503e1788cadce42864dfbdfd79b66b35cc28581efe62d62a34d5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA62298797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a446fe5b199cc8295a22c66fa0bac9ec3c465c9bbb71ee8e8d414a461b42a64. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZDA62298799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9ef6f4d1342d012c7070cd45741eb0d4b5926555cb0605ce43f36a843b0699. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6N2208323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fcd2016d989352d9f4a61860f71fd8c84f6850f453446cb18bb888aee6133e. 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/QZK6N2209379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23258d4553081fbb290901cc0dfb2f0b630f29cb955bfcb42fab7e3ec1ed0b3e. 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/QZK6N2209380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c78efd76102630b3826d7b285bcab61e708ed5aa0286622681ef5c477096e1. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZK6N2209383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ca8089a09759ac0e47bfab6c4d74e0cd96f1958c473f93577cd4ed088b316f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWZ2287326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54953945c11835838513e33f49324e3d25e625b742193b9535be17d9be8b8beb. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:51:53Z), 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/QZRP42225480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94029d26fac79f5b3d7e1c3c83666bc7a563d69437bc784c2733434dc78070f. 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/QZRP42225496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1ea63a9df7885bf2ec75f85ce957a2bc7594d64bc9f60adc96741c48258869. 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/QZTAY2215373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3b298d90d1797adee793507898da9f350f87bf94cae27b4cba880ea856a40. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZTAY2215499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6476dd4df59ed0f05c87ca921b8af2f72b14bf197c376e68f298c40d3904d81b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:28:53Z), 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/QZFZ72331331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eaec48abf9ced4785f0f0eb21dfb7be35a07a1c88d6ab3abda6bb659a83e3d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ72331334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754a5a1d2b8ab07c76244156cd1ec7a3f6d1fcd8e9926b7d52d83e53684e6dd5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES72337690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd2c95eb097d7ccb05d370aa522921d3dc364d913ec0ab4bc74e4e62fdbe661. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZES92322459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c7036b0dc143c2aee6c60bc28058eb0a0cda0ae536911d352776d646fb9e9d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:30:59Z), 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/QZHN52380553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f66de1ec6b45489daa22fb26b0e9610d3413ef61e924f15fc715c58c93c17b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNA2326818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3918fd7ed55ca0910cbf23dd2004f968cb68cce9c2c85853fd995e3f4826f9df. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZHNA2326819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec2d22fe42c50a6febc7c07e5e76425f8d4e5c06c3cc6a7bd782d2c13054d5e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN92353257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3e73ac1f99350e01b76957ed5848adc67d7f3e00aae6bf3208e7b3f83b9cf4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPEW2413968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8bd489c5607b304452c39a647a8a32ff96fec6e8af3aa9a0110b2d9fa236d6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZPEW2413970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e4c1b5b3057a18a6fc47a37eac4ab593ffb6e63b6994ad4c6d69a2bccb7d51. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZPEW2413975.