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 0x78bcb4fa6c19cd4b9fcf0b248c77b679ca1217ba96ef464d05941bd2dc66e523. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d26c56f-555d-4a1f-b51b-07d8c5805303.json and https://artists.proofprofile.net/proofs/artist/3d26c56f-555d-4a1f-b51b-07d8c5805303.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 0x6c6e0aca8a623f26cea30d727e200366746c59aa427e88041edbdc097961255e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/KRA341532188.
Lullaby's Nighttime Caress: Soft Music for Baby Sleep
Singing for Serenity: How Nursery Rhymes Bring Peace to Infants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0d012c8cd83419b20f2f1f36b339626157306de6ac65306dfe35c944a0e062. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZZ972437037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d6c552ea9962a304113714ec9decbf07547a01f0db3cbd2c08146f9a5ecf5b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZZ972437038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c53ae16d698eaba4dca890dd4088682be0c2655e4fd4bc2b343ffde49d8f41. 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/QZZ972437039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855fff8deddffd2e3394ebdf0bf3fe07de02e314fd9526834b0a833a518cf862. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZZ972437040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22488729b29d84b182e50026c423890b6b25f9705d85f23ca07b0694db9855ac. 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/QZZ972437041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f750a60a6d66d23a27beabd8f9ce67e1f1327a54a9e8b2958ba292a6090d773. 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/QZZ972437043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8f21b389384edc1b66d9473fd1a00881201d284fc4326a36b01002834ff47c. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZZ972437044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe93dd81bd6bc44714bc9c5b082ee0a0e8e31c4ece6391d26df552ba9db8549. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZZ972437045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f098eb517dd9f66049519063fe7ff1f0de6796a9c26163971a7e189800d1b55. 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/QZZ972437046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1496f169a8ce2c9e1bafffea22b023c979f4090604f769aa78cdd3d2ea4f90. 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/QZZ972437047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad79691acfa3f9b3d5914b2dd9109a3f0d05b1f904b438ebd11d2c4ca330d58a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZZ972437048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8722488053f8a6895c3e259f7d43893504bcc91ff8b0ab22cba53bbfb2910a95. 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/QZZ972437049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691a718b7688031f5059e373aaf6bb7b188e6a4417a851e4f3adf6248ffd5bd2. 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/QZZ972437050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52bc55cc5cbb7df579cb55f02846f2bcde72c1e259a46e790538583a0d8b05a. 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/QZZ972437051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ea2b579e43e7b3fcfeee6e84fc39767cee31c51da29d73d26e7bde9d27b5c. 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/QZZ972437052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fb81a5ec58390e3141afaefda394c691dfe0842bd941ae9d82e2af8d547873. 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/QZZ972437053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8111d7fc58791d3dd69733e2bda10c1a7c57dcfd68c091832fae3a0b6b71408b. 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/QZZ972437054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c545664848a2081670e72d7d297582891fe1cb90735838e2ab4b575469a4277. 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/QZZ972437055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ba31796a589874f4285ceed59810240d330cb85c12d356fe6662515c00f50d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZZ972437056.
Restful Reverie: The Role of Nursery Rhymes in Baby's Sleep Routine