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 0xbd2efccdcda5a8cf3929955f781c70d0e38c6eda3136f7dc7f861519173a2617. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72054659-3a43-4bfe-98ab-925688464b32.json and https://artists.proofprofile.net/proofs/artist/72054659-3a43-4bfe-98ab-925688464b32.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 0x5dd3d2a0648f4c56ba9965e125db8f262ebddc02f8400932dba4fd88ebcf1347. 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/NL8RL2436448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743e4603b2c559087701b5f1da807c4385c92ee5985147958ced47446aa02468. 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/NL8RL2436452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd423ec4e574ac952bb9e55b113188308565b7ed22b1c483ed3ec6d5f01fadc1. 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/HKE022211361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cef4c59c7bbf0738e0cb74761e03bd3c36d4ccffc52b631e056fec11f08aa8a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKE022211224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b646666fa912b524bf548e7f635148f97c894cb2b96906455c9e3fd6ed52f84. 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/HKE022211144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b5d7a653ab00fba819ffb8905d04d9708134b0403b7b80e0f8369a6eff0cc2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:46:36Z), 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/QZZ972478910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3517e6f02f4168ee67c147382a06d5b4ede2c9c3a5fe7ff0bef0fa0ce5cc9dc1. 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/QZWFS2450771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa32ec4900b97327693db9f739569b7d2b33d3b82be1bf28e26080d211a8021. 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/HKD012343894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb717e3e4ff1e53dea93d568f4d723cf1d388d066383e0266d3ed25448b178b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0L2374433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01bf4801d1f34f339538f8a85b1a409fab3b2f7afaa98460098786b3a60fd2e. 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/QZZ972321702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782e919cb66fb8dc35f6744875e001ad7a9a9dd0aa9462d8cb506eefdf5bc6b0. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DGA0L2353347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5306d1d72dc3509f8b9646fccab14b100d83c1f9ba65dc65a3827af279eabfd. 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/DGA0M2301789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1343886ebff6af836eee8c0239d0ae7c0265a8fd25319f20f1559a017c243d4b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKE022211367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a9f35d2b1db7bd07ef1ac3ccb9ca681f37928fbf08c439928c0501797f3b82. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKE022211359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04cd2eff5b390b10f6cb4c9f5160fc817d73b13d777364a0a5eb705bfa0438d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKE022211341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d317ae6b22c85788878ec7504726a7f8cb61c3a17c9e9f6701d54b7eb2e6363. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:20:33Z), 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/HKE022211309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ed48ba18a65698948afd3e20a060ae34098217adcbeab7dcbb847ac22105ea. 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/HKE022211302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcbdda7088117a561a2c55618c483f0f519cf7c02013937399198f02c6c458e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKE022211298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4846f3d3b6033ffc9266f0ed03456befe40ed67eaf8367b390fea326982b4cbb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKE022211248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c164631539905800036ee9eb383ae13594eaf67b1c282c21818ecfcc09e2229. 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/HKE022211148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8625b5a7f1edb4f8e6509b198380ec2e51a567af7bd250b61480d8865c8d75. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKE022211125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fcdfd8a34b4d43035823d3d03f1ff0374b33cca2b21a1f5889f277f3af9182. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKE022211083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7faa7b6e4317ddf4578bb7faeb0948a8fd1048888fa24b2e702c876082879a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKE022211051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f5a29d6f722f9f22d453351b7d2a6b33454a108362d17f5acced020bf5763d. 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/HKE022211025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94224c542d2e7edb60bc16ec945a045355492d681b31a6bfacdcdd3f9aa7d03c. 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/NL8RL2435178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f803fb7afe1995ece7e5b6b6a2ec18eb43b81995f83567abcd3026a322e0b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL8RL2435182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a9ced27553e9daed26009ee81a5543b2f3df49958955a976e8ffda941ebaa7. 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/NL8RL2435183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e03e2064477854cfbd646181d57ea4c2675956a5a46141511c1ef52d9078625. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NL8RL2435179.
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 0x55f3dfe6aa7263984853f75ef296e752afde2f97cbb7c24b2898f998e6775f0c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NL8RL2435180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c75b32c1bdf88a620afd2d1a49638571b14cd14419e026f3a312b9367c128cb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NL3M12404176.