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 0x6b152bc5d8b1c4504d14ead57b76b6ef37bc03ab571f48c3cff0d5fec8aa4eab. 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/515f8584-6088-447a-a62a-36e83a2c8f55.json and https://artists.proofprofile.net/proofs/artist/515f8584-6088-447a-a62a-36e83a2c8f55.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 0x042dd56955662722e977ed6bf061a12575686a4dd796f43a63603f4edda86dc1. 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/DGA092396788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d961b1804d50bb4b8a58a74bace98736a6eaa693964e806fc451408a3b23cc. 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/ROROT2028401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc181de3e81cdcd3e0653013a57c542ddfba1bad9947a5358a90f8feb46faaf41. 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/QZMER2054474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21fd5c175cd6cacf117ac5d302db12d677694911e63cd25d9bc0c4bed2dd5e1. 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/QZHN32312662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0407e5b359ecd7fed9ba8df5ba48c5efbc5a0aed45b2cab437296d8d23e4602. 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/TCAEL1924611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a08306b6f479b1e336e4fd46aff73bae02bb39b17d955412060a90d0d16da0a. 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/TCAEL1924614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cdb2e1f327532118c85b1e7fbbcca31128f36d8dbf2eeef37683f600d71121. 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/TCAEL1924650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ce1ea40375a8003ba6ddd8f5d506d7675f844a824a97eb6011b31337667b80. 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/TCAEL1924653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d8ea15c256268a15255028a281c96d56416ddb1b1e5b5bd8eef812c10e22e6. 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/TCAEL1924657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e4269030618852227f50f7ef2b9e3ed56a1dc673b45c2ac82375a8eb2fb1a2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAEL1924658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ceffa9c23d7390c14e53fb5c70b4e2a92a6e1cb28bc1e634fbce714c895515. 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/TCAEL1924660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b5999486578a5ff00d5566d6900a0f46d921fe50c3397d0c0547ad13e7aaf8. 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/TCAEI1966018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17cb95b5d07bb12e20cc85f31a15f7916f1725e97681cfe24dd031ab86d3938. 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/TCAEL1924681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd125492d47ceb6960896d54df35a99dde9ce3943e4a83a209903a2cf67fb8101. 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/TCADM1848277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e79bdfdfa18402d75ea715c08bcf077dd831b58f90f1e63e16aa71033679158. 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/TCAEH1982442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f5ed658c6bfcac1b0b20dc3b29f085ccd89eb0dd644b8eaa291bcbd3ee99ba. 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/TCAEL1924688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e03f553f65ec23ed2aeb844a946e7da45c30f52409722380cc3a7e01f1861b. 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/TCAEL1924689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb87aa378c170b4cf351cbe0ba50a90c44c75eb9e3efacac8637153f24596af5. 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/TCAEL1924692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc53f2d3a0d081c2e77d73428a4411f4e2379c9c5b6758233b29968aa52e17a. 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/TCAEL1924694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60395dc615ec64193842107dcb2279f448ea57efbb2b4c0c44120fa046130aa2. 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/TCAEL1924695.