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 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 0x2e9b3b0a58caf508e7cac04eb9e0c8eb99a31cd59a7925cf54d726e580cfbc02. 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/78a8e03c-3edf-439d-9bf8-9b92301c18bb.json and https://artists.proofprofile.net/proofs/artist/78a8e03c-3edf-439d-9bf8-9b92301c18bb.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 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 0x49517c4a8ea4ace7b6f863256d9c5302949c92a57e90b27395bf4a1c951a7df4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAII2487564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00069a76149be9969f0ef0548c1dc087688ddf904442f3bbaca37776afedf74e. 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/TCAII2487567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab507369802f00e3f4b1c5708d858dbc5ca5935e6624f1400da8618021e04e5a. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCAIH2487570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644161335859872bb4ec6b84bac9b78d28a802dba834d44e296a7188fe6c898e. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCAIH2487572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57628fddf2d00489c0ea314804ab07e73ee711dcf00db23e2afc8b5d21c8839. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIH2487576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f1fa712ac11c0565f4c7c0f0333d6ca3be20148df54c8674e61643f3b86853. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAIH2487580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09a9429a2b94155431b81ec5a90eb8aa27a25cd36a5922fa54ba0371b62bd67. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAIH2487583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e49f1f5223e0e5c3f3dd8d5fda33c183be43b2ac359e175b9b83c7b9d7581d3. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/TCAIH2487585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1268566bac908a74c9c26944be0fff9984975185ad095486a7e7648ff0f77df7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAIN2415661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad161427eec65fc6ecf202b8484a4052a529fdd4290bdf171779941e8d25c6b. 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/TCAIM2415662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0a99998a107acd37a3fda38bcc166dfaecee0c6877bf33a7196afe9ae42eab. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAIN2415665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3174ed5d07bb9271076c959452fefee71e93d7044759d2514fa16c7836581a6. 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/TCAIM2415669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490a22c5feaad427ebc818eadea16a1cc61c477c7386a6deb50bbca5940ed4aa. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAIM2415671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80817bc74e1878763895d5bdc2149d61518d15b01416e4f9d2ca9f267949c5ea. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCAIM2415675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6648248d6a2048f765d3dc702e808288c2c566be548053417b88f84ee0510e1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAIN2415678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39eb0c721014b07f002a6865475651fa142a064d03021bda7a76c035a3cf754. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIM2415681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197e2995979e8d8b9930ddb82f351b4f1d85e6eecf1146e996011cb69fe8c5ea. 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/TCAIQ2493065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3402e9d1b9043683525b4df193e2e4febae8f869631f6519a250cccf0393ea1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAIQ2493068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f3d74ca8a9cdadcd14f400b63d915f556f631c1d2696865d7f04925d58b84. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/TCAIP2493072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a386f10759d0ff16c9b9035ad12c3929a8acc7bdae788a3136cc6fff97f660. 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/TCAIP2493074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051a3407ae0ed845fe58b5c09d15982042ab4bb80c051cd8d42e757181bad4f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIP2493079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8779de0826bc8a5da979c91a9e4110d8ddcb4319eed00cc428f108c1a7763bfe. 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/TCAIP2493080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a2958d04a20058cd88c069e826b127579299c57bd12744256069b7986e0175. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/TCAIQ2493086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa804272d316796b38b4a8213e3f9c882842e26c07995ba9154fb7f7ec44bfc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIP2493088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93358ca4ee9cc1e64918c28c736636acc9582d272ca9daff4a6a295a40bd274. 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/TCAIW2406596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc01ec3745381720b3e0317c3b44171aaa1e01b0547930d5ff50e9cc6941d68. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIV2406600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd90859c733dc0383e230d13d4f6a6b1783c8209c5eaec55ae5fceb057374f22. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIV2406603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5801c189c05e474c53266ea5b277ba653fc9a50d83df85869e3ab150164433a. 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/TCAIU2406605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee02143c5795b7e5bb7b64fd96a06a62255c51714dbcdfe7e717dba3643fc17e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIV2406611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0088e898ad04631c74040fb4d2dfaaebe8e7c5c19b7ec0a353f590e51c9f83. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAIV2406613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a0fd1f0b6ef776d04256da5203d95080fe3816d9fcf978d781ddbaf59a1e32. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIV2406618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d94ef5c317754b8e506d48d68855c94249ba6c10421eeda98c122924a5d336. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAIV2406625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dfc3db5dff36a8900845ca20b572c0cb70e3de85ffa44bcf512c8a6f651474. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIU2406703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79451b00172e4f814edbc0e975ab0b0de298732776dbf0a2ca0960bd8e6baa39. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCAIU2406707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf599a706911dfd1f09709a9d3f08c4f1fe0011632662d7709387579c5b74d12b. 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/TCAIU2406711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9a7f75338ebfdd865f7ff2be9ebeaa3a740b25e2bf09355e8585336aea913d. 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/TCAIU2406715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3041f56cfd647c04972bbf5acc7085ed4fbf05d7c4598b31359e3406b1081fc2. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAIV2406721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe926641c3c5c6aedefad299cb81f855a199dfcfdaf4a30a4b8438bfb39cf4132. 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/TCAIV2406725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ad7818bbf68c2659b442c716efe815d0f2dcea132b6ca54ec8b577460b918e. 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/TCAIU2406729.