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 0xbb1d09b1d82b980595398a120f7727f8d5eb382b986fd2b476e6ba32b38bcf36. 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/04facc24-1e30-4b8a-a204-c09d99fde1f0.json and https://artists.proofprofile.net/proofs/artist/04facc24-1e30-4b8a-a204-c09d99fde1f0.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 0xe5e2316afa5954386b0d5b92d2ba00f9d54604f1baffdf928dcde786f20714cd. 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/USANA0475705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97b57fdfeacaabcf870fc535d489916d36ed1f0abe1f3619cdf23dce79cfb01. 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/US5UL1100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed82f3d7580c3cff1dccfeecdd2ef64073e6b3be36f34d0d077875c3fe724e18. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US5UL1230451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdeb8dad0b6fc3c2d36d9ac354a243d574028503ae634fcc7a948747f30e3e4. 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/US5UL0933298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fed9ce5a0321c2547a90401339427f25362a9cb788d4677f4627f4bf951f610. 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/US5UL0903885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934ecc445fc13fbc10914002169ba0ffb52dacfde59990bbd07f72f6420dcf1f. 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/US5UL0901995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bed8ced72380b55b35dd49056aebe674e869ada1ae5899a909a8c46a1fb7d1. 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/US5UL1342321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ee8623f382d9f69b185e2dff98a4b00eb27b4fa3bf1169a0c4224c06158f11. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US5UL1237592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b617e5bf2afc95ed2cb53de85757777957f21a18d8df91ac584c55034d87c8. 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/US5UL1520419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2008a0f0998551b9ff0e64ead8fdcd0e0f07e7d32684009fec0e3e0faef31821. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/SE5XG2308106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f35ab9105f425a625d6b5ce224633b66f8c88ca9d6e5130baf8ec961bafa54. 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/SE5XG2317417.
Coffee Table Jazz: Relaxing Instrumentals, Vol. 07
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06172f51cc8c44cf25339aedf7e63752206c5f5eaa23d62ac8f26524894c7a3f. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBPS81500644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ee8623f382d9f69b185e2dff98a4b00eb27b4fa3bf1169a0c4224c06158f11. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US5UL1237592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b724601234a58bb068e411c861345a90ed6d3b2586334c9a849f258d3f2dcb. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US5UL0781017.