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 0x0a5e686958ebb5a89dc361421e36f5d44fcf2963f9147857df3d2f798fbb27da. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2162531-e115-429e-bc08-63af3533c66f.json and https://artists.proofprofile.net/proofs/artist/f2162531-e115-429e-bc08-63af3533c66f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Most Essential Classical Music For Your Baby
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 0x657a2ac9db40804ec3ce8d87148718cae4d7397b6d24b8171c9d12994b1732e9. 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/USTCE1002974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c3c99f74b24f343da7a63d14fd444719df6e4d8e78efbbe30f986b0473f2df. 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/USTCE1002971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2739e2510de1bfb7ff40e9ab08842fad367b38a29d9cef669f904113260028. 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/USTCE1002964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35c34f7395c8cc7d9c05680476497a6b3e3350c1d360b52e1352b3befb684ef. 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/USTCE1002980.
Piano Sonata No 9 in a minor KV 310 1 Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80c4cf89452bd27b97eb207ce24a6253445baff414a2e908d19913665d9339b. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:03:22Z), 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/TCAAS1029336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311aaa9065350e24ac247ac6316d1bdc6c5b72506c44f902d217b1a11f5b964e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAAS1029332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd726eb3af8b8e0e87c012ccb6979b59c3c8a34e616ef176c3cd0a98bf16eed7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAAS1029322.
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 0x2cce730f3469336f1cfd74291c977af6cd3301a7c150ab4373c1376538c709eb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAAS1029328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd498209040bd311ae65dd2d5e96c2f0b37d37f0e55e6bc11e0cdffe77ccb9. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/TCAAS1029324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe791fb9f8ada0fbf6817311db883cfef85d196116465e84cbdf0abcfe9543438. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAAS1029325.
Pachelbel's Canon In D (Kanon In D, Cannon In D)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16fbf74090fcad852fe546982c6404bd71652fea75cd42b8f42c04f445c8930. 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/TCAAS1030613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13735fcbc6cc2b7723a515fa84dcb772bb97deea9868bfbf3f2ecfec346ef147. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAAS1029326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2c91423af4df91278e90041d38c19cb62a55ee5f4b0ac569a1b27c5f12da05. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAAS1029329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7a784becb4571a2117b5cef8696e1f3c27f013b3c725745de17a792ab6f34c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAAS1029330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe911ad5115bebb3f6db1427b38d1f73d762486fadcd63fa9d7c6d53018bb25f9. 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/TCAAS1029614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7824967b6945dc8e61054a54c1fecc2ab4899b5f39774de483d982eb4125df7e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCAAS1029333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084b1f1a9aaa6d42b38f991f405afd7a8018b9d7fd7bc2470d7d24c4b4c78df0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAAS1029335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22235e806ad17e28ae0a8e3f6cb2a429e61fa9067fa5219c0b3902a4ea59e1a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAAS1029337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd581e0a5dd419fc03027e2acada68ca53813be82215c64256dc107f85bcbe9b5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAAS1029340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168c6e70b6ac5fcda3ca6bb95fb61520158097fc20241483ddd4c1308d77cacc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAAS1030614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54dab163d66767cca0c1296d33a10919d40d8390933bd32b5ba932d503bf392. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAAS1029617.
Carol of the Bells (Ukrainian Christmas Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e88abf3d6fa0a79313b1c080c00cf4711681d4bd0a8024efb787e14f451eef. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCAAS1030616.
Piano Adagios: Relaxing Classical New Age Piano Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b9e6f5bae4159c2599984a7278a701040adead1996b764cc6fa073d6c7990. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USTCF1078809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b08e90a54218b7a7946516cb8b110237ba81de34edc70e3375dfdfce07657b. 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/USTCF1078805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a4a2749b3baff432294108472ef8ad8e3abe70dac9db28b43c5bf296eb7c45. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USTCF1078804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b3875f438dd4b3079468555a4b232f8ede2ea272f3d3a1192916dadf5160b8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USTCF1078813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3873399bd1c90e57862822e3e9d189642dbebfe1730e34fc31f21838b10e0e95. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USTCF1078801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3286d1605a95e60684c308ff3ae850a04a68fa580aac136a0dd86a8dada74e47. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:13:36Z), 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/USTCF1078802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7476f4f53257e62e136aa5b2a394bd0ff8ac94338f31343cd1b1b3382781bbe. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USTCF1078800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51de4447544f5c7bc0f4db4c4d82afdd7d46d3053f04a15fc368855a7e2c2ec. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USTCF1078808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b5e64c4eb8d80baf3b8a38c2969152e77dccb5f760421b54d1bbdd17465bc0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USTCF1078815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d14bae16b36e0e1db6d42e21fe53f04d9a51c112bd899962862cc0cab4d5b9. 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/USTCF1078817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4b2485f96d6cf9792c2de12a824145ad6d37e9b7c76adbff98ad7d7caab201. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USTCG1017299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabcf893affd7556ef7289b2978cef0b5868ea9643660182c2c73a94dcb1d689. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:01:05Z), 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/USTCG1017301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5d49c44cbb358289037282c42a930b7ccc67d6831121c026ca29c673cd35ce. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USTCG1017304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7e06186929e04b24a9fdaec44b81a46aa3efb18c6f9f3d2ae069a9cb0cc0d7. 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/USTCF1078812.
Relaxing Classical Music Collection, Vol. 1
Summer Piano: Relaxing Piano Music, Vol. 2