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 0xf012e44de338e8fa8f99c527e45aa13140f3f7f2019298df6eb77e997b31441e. 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/3faac77e-86a8-440d-99a8-fb060406fb97.json and https://artists.proofprofile.net/proofs/artist/3faac77e-86a8-440d-99a8-fb060406fb97.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 0xd44cec5f228bf015f347fa43fa9c07b10782cb8364e30a57f77d196c0ad7713a. 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/USHM21622424.
Piano Music for Day and Night: Inspirations from Clementi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f7a4d807776e7b9829614cd3b00ee6b365d6a5788bcfc8c9ffb3ef343a3ee1. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USL4Q2026838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a24c96801cf956c761baed2483e1fce95c60697751278223c925f0ad700ab6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USL4Q2026843.
Daybreak Arrives to Chase Away the Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5077d6ca7012764ebf1aaba802f692afb7102ba4e95a4cdd3c80be21c44421b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4Q2026844.
Tranquil Dreams at Twilight (Soft Ocean Waves)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393d0a4f9e76d7b76036882778532cdf9f3ef08cef1aa787b8eb0ffaaf93c60e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USL4Q2026851.
Calm Nighttime Melody of Serenity (Gentle Rain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a5c4aa751145c5208d91d2cb433964a4f58b08e6ae91817b7209606d6a5c85. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USL4Q2026854.
The Evening Waltz of Imagination and Peace (Gentle Rain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde06b1589a6efad9bfb265f8d8997c254ddc5df380e5203879c7f18ec0b9c062. 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/USL4Q2026855.
Deep in Slumber Under the Midnight Stars (Gentle Rain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984a7e6a03e9e1b6d13338dfca34648a255313300e6c4325b1dafe0c6c763c36. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USL4Q2026856.
Relaxing Piano Lullabies: Inspirations from Beethoven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cad2680aa928f4f994c80f9d6c1e13773af723db859ba0fe467fd042ac5834. 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/USHM92231018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562cc1416e17091a41ad294f23d745814f2eb29e99de3229d37dfbf27ce62dc0. 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/USHM92231020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4baf089b0c7e066f26fb0f720515caf93b0e1b754e0557276970ea04b0be1f. 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/USHM92231022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d5d22c8ee8cc3beb88e47380301aaa3239067461526f42171d7ea6d5b7e922. 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/USHM92231033.
Calm Piano Lullabies for Sleep and Relaxation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e464af5cec5be9cf902fd2c4bd2084c6c3a538a321a7c64c40698b6c623b58. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USHM22304588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1d05ee5fa5dc60c6843fa72697613ea093bbe6ecbeac85842e2fd6637bd5ad. 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/USHM22304590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dfa440799ac425324b83264881621d5603a209ba692d48fa58312ba5650ce1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM22304591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed77f2e4679d8d653bbd64ac67b7b314f3f5abf4da1277c43290846865007cea. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USHM22304598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd37351bb15dc99f9ec684f63a2f29b3c799785f1eefe2ea15499ec6dec06f5. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USL4Q2357665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e2fb8eb2365cfc6d94ba7d4fcdebb1376432b084a0d9674641c55117e305f0. 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/USL4Q2357667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c13247f1716e479d926259e564c6f8046f39524175404008c4f40824e6adbe. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USL4Q2357675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e36c3aa1f3db5ef75123ec914a83b6c7483d389cf2584bd009d1cf9164705b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USL4Q2357679.