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 0x94a30ae67dd6aceb198fbbf830bd99e331c80de5b8ae0d027dad639b4ec029e6. 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/bd1c0570-244b-42f4-87b4-47a117132443.json and https://artists.proofprofile.net/proofs/artist/bd1c0570-244b-42f4-87b4-47a117132443.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 0x6a5ddbb6a2a60576c3f1e95896cb4bbf4281baada3bf270bee74cce926b42eec. 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/DEPX42200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163fb3a2f8404a4609196838aa86751feaad788d1cd42d624a15df7e9f37852b. 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/DEQ022001675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553c205bbbb990f89c7297100d2761f73de7a52a6e7ad2dca6106b99337da5f6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DE1BE2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba369808f3e03bc0f2008f98e5247b6d505741863a13998dfe3cf5a648aa83c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DE1BE2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c77a85c76fdbf5060c3ae188743ab40f7caab900aef0f46cd52a09f1066d3a. 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/UKN6K2300739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad91468bca64e4d950675bd871015f8ed6ff2a4c99ff462f4df1c620a3bdd806. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/GB7NR2227102.
We Will Forgive Ourselves - Damian Lazarus Re-Shape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5228a8d8023ae4014d2110cb1f56d6b769c7a109885a03d59c4dab3e0fd90d. 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/GB7NR2227103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dfcd2a414c621198690755631bbaee7bb5643edff4182f2816d211feec5135. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ022382575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dfcd2a414c621198690755631bbaee7bb5643edff4182f2816d211feec5135. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022382575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2129c76b09759c71329e27e59bd63953476824898d0a6c264d0b48f82f7aa66a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DE1BE2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790d116f712d5caf835126edca7fb365760995267972f02675a46d28589ec929. 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/GBENL2404034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3780bc2181b9012a19fe5929b71a17594a3a595cae3d0da8b360f05cf66651. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0Q2496901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620dfd010bc80b5f272f0d424d76a879a2a941da1ff035ec2e2e994f63cd2504. 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/GBHFW2100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd667b5c7bd91cbaa9975343033603ffb4e99d45db310abc150c19625e08055ca. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/AUDCB2500012.