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 0x10d32b5d98fdd0c196037578b382b84b4a6d491e10ee7c38c362d9c2d6073dbe. 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/3abe499a-997b-47c5-a53f-7380a2f37c4e.json and https://artists.proofprofile.net/proofs/artist/3abe499a-997b-47c5-a53f-7380a2f37c4e.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 0x2d9e2e2abdbf87a7883c57a5240b75d87a6e32e939bc727cd939f976663aafb7. 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/QZES52130035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f88524433a654a32d898b95bff30c2456bd4239f2700fb47702bbffbba5ae8f. 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/QZES92198048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11363eb999dc86ef31c1ef29ee7dea5be65d145fd4402a7115d64cde53fe10b6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN82122522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba832ff07985a79c361dbad62640551e7a042549cc587306a2159b09938c2ef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNB2164002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf191e3562ec13fa63925d2160947308406ef10853efad7578617bb703a814c3d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:50:32Z), 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/QZK6L2140785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d192fd2b212baf210c2d16c447db6e633cf0041279e185db07baa55426d2b2c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:00:43Z), 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/QZK6H2151735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12718b74804bef37f16a252a2ab9df06fbb3ec9afd6dd2416e0b2eedb25d743. 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/QZMEN2121487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034dee6bd7ecb99ce1da8704622cc36d507b07294f1034b4ebb6f32eb44a8e4. 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/QZFZ22281983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8b881b010474460092b2f0340478728c24d021d5cd1e02b39fb0203874a935. 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/QZNWU2305154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c73ccfbe20fced93aa1199a84ca05cd7c9ef857ba898055d14e7683b3a40938. 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/QZNWU2305155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8700937cdb607c03d5ebe38ef019ad04d89739f2cb8615966fe316ae0f0760d. 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/QZNWU2305156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3380bbe4326b597c30c6e6b20d75f3753b056a80896fe303adaec2e41d5e1ccd. 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/QZNWU2305157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f28d1861a39aefc8f49623cdf6f848e0da2f8a0d997e43fedf218fbff7b496. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWU2305158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f3bf913e359991bc7aed268fcd24d5a6288e4ca95186e5d2669ffa769e6c6a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTAZ2355945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92355b6965ead9dd2c680af23f791927cd213f4d85323006c3a37c1c2170681c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZTB72353011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb56dcfcf18aa28cd7411afda28aac28abe1d188106c6fab8ff4dde4b9595b6. 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/QZHN62443394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3c4d8533f6e650a5d4e739b10b652c6ef7572fc7a2ae8063071081447c9e2e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZNWT2480666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78e0a81106013d380c68e8db78b516c89f0de66dd295adfaf96329785e259b7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAS2496216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2ff34bfff99ca5f111eac3a122bd9ffa0543cc20511bd7ae135df1490003b4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:33:58Z), 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/QZTBB2499584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbc3ca71093edd25836c60d6c894988684d448992434e287dfddba7482c794f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBB2499585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed634792fe2800fc74b312cc86b52caf412241924dd9b608990e6ab6e0368d4d. 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/QZTBB2499586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902c07a7ceeab9fb3820e1cef17632e789b59204d8a19c66dc1fee09f8909c33. 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/QZTBB2499587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9adfc468295166a990b62ce5552f34d1c3647ef658220a15276a770c457fb7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBB2499588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23524af1f74b7d4ac9d5002f36c7dd29cdd214f4081cf09f14b976ca5dc536b3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:59:08Z), 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/QZWFL2477915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb6e6743b377e0b0b911cbc47bcaf376bf8276a80132b7cd7c7a4ff286cf943. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFL2477916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af8b653c823bea46d85a104dd5ce745b3108c14f32066f944fd0db084b8fbe2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFL2477917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753a009cd52a018c33ffd594e8867967f66560d66e3250e4d42951fb28783303. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:16Z), 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/QZWFL2477918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439851781bf650a906b50859dc6cc291ea1be49dd90581def5fb7b73b8e4d44d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZWFL2477919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d308a2c8fa64b1ebd8f680eabbc0af54300134188fb53d5bfea0c0c18eae2. 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/QZZ782401319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bb5c05aa8a027c618e6fc96673d4d2344372f2d74a9900e7b3cecee943c9a0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:58:14Z), 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/QZZ782401320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0756193cc421cba278b245cb1a76e622659c1cb166769b7ce27126a62af28ee. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:30Z), 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/QZZ782401321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad8c5e73c8cf1d3fe43c9011dcc11e9e10e8c93929e6d8888d845c3ef9d1531. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ782401322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbceb5ce098b98caff16a76b15626d6018c1238f2c7ba06adbf8e9e0fff9310. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:05:15Z), 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/QZZ7P2458210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7481791a32b81f94ce3734304e206c7aafc7b77396d15690e977b3d0ba5581c4. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:27:36Z), 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/QZZ7N2555024.