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 0x5860905788cc1579f2c9c79e405559d2712a84091902abb0795884ca02e9d33b. 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/d45d7b80-b9fb-4a12-8bd0-debeadc5bcfb.json and https://artists.proofprofile.net/proofs/artist/d45d7b80-b9fb-4a12-8bd0-debeadc5bcfb.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 0xe7449e0f2e8d06fc7c916591bb3cca7474441b75471499a00f63de493e2e0ed0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTB62555595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d659ac7518423dc013b3aabbebb18efe393719914068d8fec14630a05c927c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB22576180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f84137b81bb350b855f0f7a18e6ce91191044f0d75b5c1519d249cb537f884e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTB62555596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d659ac7518423dc013b3aabbebb18efe393719914068d8fec14630a05c927c. 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/QZTB22576180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37403099d3c71a624565e244f8cccf6c22f8a73f9aed077b0ad8153db875e539. 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/QZTB22576181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce7de86a0c40fd46973f6fdcc325409ffe7dfcb7a198847704c297ece02d46. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB22576189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0432d4f85c9b51ccb3d999d94d8d141678cb3b63b1d7849b9d689b60c0a6eef3. 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/QZTB62512048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd2a0054547ebcbe04a8037298db53595fba2a2c56653f4d4091f651a559dc9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB62512049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23515fe97e65ca12973d59b1d133c5d4cd10ce9e27bd892f6de73a6b024234b3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB62512050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005c1a51f4d9b5161d2b276e38a0d08a07dcf93cfdd88ea0789f8345a346b0bf. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB62512051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548204ee82d5ae3b72dbc81d9db62d30c747e23e31510b1a0bbad098c92e4713. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTB62512053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9216df4a799a2b5b2fd1e9a1d863ec8e10489bb8efc6004aa2aa79edb8628acb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTB62512055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea086dcfebc4b2bd33b43a9c0c3d7f95bfb25adbc9f400f7319bd62e385a579c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB62512056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d536e648b5f5f6474e9325adacb211039d5e3ba04ec61bcfcb90afc429ae33. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ782594956.
Slender: The Eight Pages (Official Video Game Soundtrack)
Slendytubbies 0 (Original Game Soundtrack)