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 0xd2c05243bc906aa611a8df2e1f5d855f40ff4c3332fcaf252cc1130568d35d4b. 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/c629c15e-ebcc-4269-9cf7-b17102ef5e19.json and https://artists.proofprofile.net/proofs/artist/c629c15e-ebcc-4269-9cf7-b17102ef5e19.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 0x73dcbcac15998e7e45c9780670d001c9bf9bdbd6c52487fb97088ef5311c1037. 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/QZTBB2331950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bf4c2eafe3c5fa8c56260d0017ce7c6f461a4822e2fa4d659b4795f8f8d128. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZES82489891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1ca177caf148a84886fc4771820241badb4d13c6c819ec8b89f507c3863606. 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/QZNWW2446483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9885c24c3f73a0b14af00acb0ce8d439275882425a7f1655b0f85789fe79823e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZRP42496235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345fb631081e487d28caeeb80d88f0fcc2390501aae1d3afadef4a26709ffa46. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB22456834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069385c1682eb981ed2645470b861174c6fc1a27a55141ca8dd1d579aae440d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFM2400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f998880afe13f5728e36553bab0fdcbb00241a18564412613c0ff43ca600757. 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/QZZ772443159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4765ee9f8a671d8b19453c3b5ef6733d175221a4e23d45d0eb74e3827599dff4. 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/QT3F42416504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a0415ca3865fbb4af1b14e70e617799d4ff03cd158e86f1c3163f14490bebe. 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/QZFYX2579352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871e7e478c8a37430c218287c8d187599106df22b75b716777cdf698d6a4c70b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFYX2582264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4765ee9f8a671d8b19453c3b5ef6733d175221a4e23d45d0eb74e3827599dff4. 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/QT3F42416504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f998880afe13f5728e36553bab0fdcbb00241a18564412613c0ff43ca600757. 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/QZZ772443159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a0415ca3865fbb4af1b14e70e617799d4ff03cd158e86f1c3163f14490bebe. 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/QZFYX2579352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b36bd7b633d754cc2804939925f02c903e8e3fc9fc8695739aa78ed7179a388. 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/QZFYX2585885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4737d385f030b980eff9fdc3c2007c5b99f98c999d1d7d3f35eaacc6201a12b6. 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/QZWFU2449941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871e7e478c8a37430c218287c8d187599106df22b75b716777cdf698d6a4c70b. 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/QZFYX2582264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9360c5ac861df361c6c155d52ba43413e2dc287b9d17f3965b4c1e116fe0fb40. 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/QZFYX2585886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa446b53e0d4df3d2b0418c457fc026f5c235359a24467096f669329a0d0043e0. 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/QZFYX2585887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e55a5f146373238d73bd914cefb10da5ab5f4ae4c14a351717dc7ad9cafab79. 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/QZHN52597079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe641565a5121b8618e0e3ca8e1c66fc6a893129c6bc8b40d404f40b3a59e84ea. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEN2552145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6da1b3283b808775f5d50b80691e138117cad86805b486492a9c81d47925b1a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWW2570670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2936b266f01d0e0907470f36a03d3bfc82b62a7a39cec904af5893f59eb46e54. 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/QZTB82575523.