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 0xb5be15fd68162b02a0ccd1a7bec1ac972c08b3b86aa7f25140eb9c44aad55ed5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f40eedc5-ac25-4431-8123-ebf2a769780c.json and https://artists.proofprofile.net/proofs/artist/f40eedc5-ac25-4431-8123-ebf2a769780c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Songs for Kids: Classic Children's Music
More Songs for Kids: Classic Children's Music
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 0x98d3a622128a342cbd0c54a3a2bface0bedc5abcc2f4d0c894a48a905a08c1de. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/USCGH1746023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c89a3bbe1f9c5e6cff543985ab85bd6474f999699ad2c75eb3f7282720d39a. 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/USDY41852902.
One Two Three Four Five (Once I Caught a Fish Alive)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b163c283bf219772c88f3b3c8b7b735db46fe3fd7900dde6462986e1c3a8255. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:10:28Z), 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/USDY41852903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44efd6b63da3028ff010f15521f607e5c9ab6b096c82c27998b0849ccbff05ea. 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/USDY41852906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa5e8fa1b90859c2eb52a38cbb5ca6554f687c66c9760672acf04275b495891. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USDY41852908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f3558acc2163e98e0c22bfadb353343be8ffd95d391aa6a34b90c8aefff0f4. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/USDY41852910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c296e14dd8b9f4170c9b952f81905924549038b5567cc2d058fb8d1352cb8df. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USDY41852913.
New Songs for Kids: Original Children's Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad673784316bc6cf05a6a595c83f9925bb4ab25c9eba8dc2bfe6be58954050e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USL4Q1859846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28677066bb4999714a88cba4a3489bff09005279d3099390fbf27b124e87a138. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q1859849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35a7a3e9e484363bbe3a99f12aee4f83c8036153d001fc8a018b55d750fc33. 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/USL4Q1859850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc913742f90a8cd0c51fd5026add7d1e65f2c0ad72ff5480d5109ac7d46b9702c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USHM21981440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f1f30904323eb0ae573b1720fcf15cf1d83bf54234c0312c3c825cdd0f90dc. 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/USHM21981447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449cdf727ed47c4e8980619cc05a33eb735383361341040a212e90693e6e8b0e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USL4Q1990525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fc2f6f63b6a4a3960734c671c634c8f2bf03a883ba11c3838c92a86566f067. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USCGH2102719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cedb78de8fc7a3fa72c75a1f1776bb27a73e15de99b54328056cc626121b64. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/USCGH2102720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d6cd9a887da90e1e3a0d93c8a4b06f6c338aebc63292ad6c5e818e3bc2fd93. 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/USHM92177780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc142e472928febb6398fdb912fdc3aaa7f3ee410872c6e855bb284ba9c70c01b. 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/USHM92177781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a2e5774bb2ec9e2b0e1890ef4c244824fb9309fbb3196715dcbd7e9ee62dff. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USHM92177782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc94095814cb4e03d096c789f76e490b974c9eceae2d439115301c5222d21a8. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/SE6852300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef77b06b48ba04afa9615d0611b34d1f0c19e1366e4a80076883f6e256f37ec. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCGJ1616266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5991bec6e72e6092952f3a550814afaab6e7406ac8fcfabfe9d2954aafac199. 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/USCGH1746026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a857635b40a8bc2da97c59a5b0696d364a9e26e6e3c1a23ab0e1c99e8864b6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USL4Q1859843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440ce0f1844c139a6da3f0bd1f4a9037c0e07de4b9a63cdaf023b7dc8caae6a4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SE6852500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c106205466001787c6cc7e7f0587aab8ced39c3da9422b3fd5f9465dfe4d017. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:14Z), 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/USL4Q1859851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96bf293534b67a3b355375f854e1bbc9590e347beb4be5ec282c80a41dfa16d. 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/SE6852501201.