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 0xb22e434781fe7261a8be526e5fe7912126a6465da80e0e638e19ae5946e98e33. 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/ff4f0ba3-e71f-45e0-8e6c-066d59b8ff1a.json and https://artists.proofprofile.net/proofs/artist/ff4f0ba3-e71f-45e0-8e6c-066d59b8ff1a.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 0xafd11c3102f3875b072e10dcc942ece3fc60733ef4b20015f36d689e1a1763cc. 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/CAN112301219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1f4f4c5b65d062b16817cf3c4a5c8d8d97c699ed00e10d913910bed6c04312. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CAN112301284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fefdfcdd936e0d2a6334e972cce4e4aa8b0d99d8872589c734a0f2be75754a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAN112301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c32cf41461ff2c7b5320f8d4e32f92a22d8efcde3c5ce7d3e925cc29810a439. 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/CAN112301441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30ed203f4cc32ca9e18a79569544b66d26661a05a84e9481cdc5e9350a9aff. 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/CAN112301209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301d4377e1634d26e656db4d59170c38f934a1c8e51a8866b0c4a6827802aadf. 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/CAN112301283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7199d741987735acd04c7eff0c2430ba8fb506a3a6ceac7e0c0803c9a224baf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAN112301442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64767ed3a6a4ab1018b7bcd860ab71cc8543d9da94f6ac6d0ee149c29a03360. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:24:13Z), 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/CAN112301443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30ed203f4cc32ca9e18a79569544b66d26661a05a84e9481cdc5e9350a9aff. 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/CAN112301209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276c4f370ac7c9123ff77f1add129adc956f8466d1b692f7e28137a3ed890539. 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/CAN112301077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd11c3102f3875b072e10dcc942ece3fc60733ef4b20015f36d689e1a1763cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAN112301219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117189ec14a4bffef46e1d642915b00cccf05f2cd824913cec695e2a3d4d2b80. 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/CAN112301076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301d4377e1634d26e656db4d59170c38f934a1c8e51a8866b0c4a6827802aadf. 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/CAN112301283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a10c230910108fc5a7fafeb260430fb869b93ff9bbf107f02a5978e922df569. 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/CAN112301311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8506dccd7d4c27e3d39ceeb41f5e28e63c86954319c3396cc6a86bc7646672c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CAN112301078.
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 0xe58f570027b06da342ac0adb8194335389150069fb1ba3ae96142422ffc2da12. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CAN112400463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21470688be5facccac35515fc673b3e40debb66c6b56865db9bba1c145633492. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CAN112400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8903eab367803699f1d620f0c41f93f0a238a265fa356893fcd9fb52736aa95. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAN112301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cf525eaf94b27b9eec4f660812d9ae544ac9b4b9b7a48553ac5423a942a156. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CAN112301224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbf6b04d8b46010dd0fc6fff3072107f6ccc5e24a414d7cb933841932903c55. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAN112400545.