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 0x442b8f64baefe0154f2b07eb715adb51530a67aad040600ee5c9f536ed0dc940. 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/ecec8fe4-bfb2-454c-96e4-d2df3cf2f70c.json and https://artists.proofprofile.net/proofs/artist/ecec8fe4-bfb2-454c-96e4-d2df3cf2f70c.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 0xd1c4399ef60f4425ad49ee118a3b3ca18e416518022a470a523ab9f9c82091cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ842300492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc355fdf98a2e9094845817a8effbdeb0c29981acf03abc588dcded67fdada73. 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/CNZ842300478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ef0405b954a71657c1e7ed8bd02d5d292400b16679373e198aec0dfbceb28d. 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/CNZ842300479.
三千世界不见你（《宁安如梦》影视剧人物曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf646ca4380fbcec879ced053bdc77862e5ec1c874e2e4e3b1ca18118895c4f3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ842300490.
与爱（《宁安如梦》影视剧“宁”主题曲） - 伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974da684032835e88cebd345bd17b2825b8f810d4d9267c4916957b7417f975d. 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/CNZ842300477.
借梦（《宁安如梦》影视剧“梦”主题曲） - 伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1732c3c66cceb53f21c25732c4e90c23f73c9dffd0ec5f9898898e13fcde3e82. 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/CNZ842300472.
雪季（《宁安如梦》影视剧人物曲） - 伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92432bfc428a999679ecc80b8bcab0af355f4bd9b9f14afd8658a49931a0d555. 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/CNZ842300471.
三千世界不见你（《宁安如梦》影视剧人物曲） - 伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f1c09214ee791a3e6d1bc813dd9b988091ebe1a7f7a490ac7fd948f827507. 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/CNZ842300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbcf307623f521158c29b13817c3acb496fab3788226d59286a5804691d586f. 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/CNZ842300919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56258f75d0c527a22e281872ec610a456f3a9f388fff8edb56332728f79fe3eb. 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/CNZ842300922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4cad83e61ca5964e981c32b1d14efaf77cc994eac7d66ba781a6b127820f72. 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/CNZ842300911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b82e282b684c3c55f105c76dcaef06e49d046f811a508bc945ce12c71ca00ba. 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/CNZ842300923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6092e426fe764fe47bfe9c494ee530ffd4dab5275168306a9877137434d87e5. 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/CNZ842300924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1586d3a64ddafee648b74fafb879a4710a8b162ca0cf1c412c46a965c43104ce. 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/CNZ842300925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952ec7548b25990ee01d5012655eec0cd6e96d0962c3e071df497499e12a4de7. 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/CNZ842300912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168a37128bdf151c72dd3b50d8dc9ea22eeeada4ede19f7e1b97e87d18e430dd. 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/CNZ842300909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c98c9644ce2900d3728057cfc76e8ee6e2d04646f763632d0dac7af05d40baf. 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/CNZ842300927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee991eec862e7bdc879909e6d4e865aea119e8ef2343c9ef822ec36e69c0d0d. 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/CNZ842300931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36446c92b630c24653dc8c0a45668cca1bec8bacd3c4bcf7f4de5fc22a3a33c0. 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/CNZ842300915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e282f6ec9067bdeffefbac426b8ecfbd7220e5b3be70a2f59ccfdcb956443a. 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/CNZ842300935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc285b9f6cc9b56064faafaf1afde1704789b98206501df8b158328aaeb700352. 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/CNZ842300936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548e8e54068564dfdb38391b8b578ad0fa50c8b01e35e824a9de62fee340c5e. 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/CNZ842300916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43f34115474ffb27b99dc12069cc3b9b1e5ce899f6745f27f899f0a4901fe42. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CNZ842300920.
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 0x8187e35fecb5b0c55740bfac4c793b84a7c58a41b68a552895f304106950bf23. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CNZ842300921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66030a5dc8f318c7e05262ee83ab372db62950664c7df6c233b5cbbee8b41dfd. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CNZ842300926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f07f529cb17fc9929cd775dcb48308c695f22a76fa08fc395b806cba539d5f. 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/CNZ842300928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cd4dac27c00e14cc746d0cad97af472c70ceeb559c705be9bc21cf68081647. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CNZ842300929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc164a4f2e812c8a9095f22c6b65b38714faaa75693947e17c4a973b28ea66c84. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/CNZ842300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf54f1d4e386ade09b71b8961f8975162dba48b63fe84afa722d6e524487c1. 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/CNZ842300913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4899618b1c9617ee1e1941e1f6e340e30b31235a50bcef8387bace9ae23ade9. 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/CNZ842300914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5409af597bfe5d8b1fd31cb2620df3b85d4f9d015436bb06cd7276e45910884. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CNZ842300932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8f43a67e53a79e968f51965cd4185bae284ea7f078ef459fae6b8d5e7656bc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CNZ842300933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d77470b246ed597d55e7f24551440e3655e36418ac19438ad24b7a4360a33. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CNZ842300934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992f14a7b0469acb94fbdb6c96f546dcd98427bbb22267f3f3d60ad82386c4f4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CNZ842300937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330a3b8fa620a6c57ea57abde36a2a7531203cd118c9d474469ee687c0e0e960. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CNZ842300917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3a6c94bd6b55ba06a68facbb1d34f453c08a818964ecd297b0aa336dbf046c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CNZ842300918.