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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4883cefc6830d14cccaa14fb68516bfec8960d6f71b4c6ff065e5cbf046030. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b03c3cd-f369-4c17-9a2a-9697d517f9f9.json and https://artists.proofprofile.net/proofs/artist/7b03c3cd-f369-4c17-9a2a-9697d517f9f9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fed70e77ed70379db3dc18a7460d7babc860dfdf9081afc6dea081de31bcb98. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAER2097666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4729744c3a95af689267d4ce0c047dd7286436f2780ad49a413130b51873b645. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAER2097668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c1333d36d08dc2d20092c00780c4707ffc0fb6e1f2f5e2d0e8d2ec2db7fac5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAER2098019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117a91201cd50f5315d6b133df470d1db5d532eb67a195bcbb9f5854a6ec17c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAER2098023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba4a193ca54d047e9c4b02da6c4fb3a0b417200fa0fb85f66ae59260fda9e83. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAER2098024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30874f231e4ddc3ab7f726e2ac147b6ad93b88bdaaaaa082e0ba9c3be13cfdbf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAER2098026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8744914ef8f827924311d2a60c3707d9a9b6f452eaf1ce9fae97e7e186f0c1. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCAES2068581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834599ef740be8294c482e9064d40b1686b0c33d2d860db054f871ee045318c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52082464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ce13c4db43df37e4fbd4fb2508d0c4dffc1f6d4726376ae9b52e2425caeb33. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6H2032019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c43ea9786a9591502d08cae7890a27b6616cde1aa1c713799ae5720ee853806. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2100256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c8799286d4b39d6f45cb3f0c75655715e6394c9e860a7bb4b77b83ec0e45d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2100257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edff44614af75a3fe4a77a8243035ebe18cbcb31cadc90089a7b3c1f4770400. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2100258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c00bee0ab1b6751d1d11a046db81c986d93fcf7d0478f17b8e9383db6551d5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2100259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4f6c6f72fe8386cc566fe1ae51b249e0835a90b10c142bdb0029debd11544f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb030edc3778484d59999e2713d2a49e46b90f5c89174887296d6ed80a80668. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d6ac5fdf65f1d4f1ce8cc1d3a4c0e1113f0b9bc8e800cb44ec267840bf6b50. 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/GBKQU2100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05d8357e4da241297da1905f46bdf5331ca29488e26a0d9c4b53e1e18fdc8a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80de8429aa2fa219448ebfd8808863049b2e6f21ef82040bf2e9c436552fb2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2237586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bbc88a21ea1d60ad24eb96e0fb7d4aa80a1ff6a6e877022e7ef9431d79412f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZH6S1900428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510fc24401fedd9ab71c0f4f44f46e597cdd8edd6ccf1502b8a5ab805f3a18a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZH6S1900429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b75d4718c6d7008ac67ef172131b5c775ac60442cfe5546d20f9fc966f8d53. 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/QZH6S1900327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c20cc17ddcc456f0d9ed662f1980007e08458c33058cbd0bf84cae779535ce. 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/QZH6S1900341.