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 0xb2258e38eab92f9831e451b6a5f76480398ff877979dd23afce03a17739e8868. 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/55954850-45d8-4def-9e74-93ba7e7f63cf.json and https://artists.proofprofile.net/proofs/artist/55954850-45d8-4def-9e74-93ba7e7f63cf.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 0x8428fa053f6e88a58452d1430e689e7a609c06ea9d7b11eb3bdad918fb8211e8. 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/SE6TI2307448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c9dbe56ecab9ddc188018c6b046881c4774267f8ae88ceed10977717e03a5. 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/SE6TI2364991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9552b647435b055df9527cff5deb514fda1a9cebdf4323491e197d78527de47. 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/SE6SA2328011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139472d1c432c54b5aebdd994bd9e5c344397dd3fc518148ce5430ddabea860. 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/SE6QE2317812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3792356cbe7ca3a63d3e8370eda08033d8901ce9604163b646f0deb8955ff7. 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/SE5BU2331794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56e52ac2b872763ab86954b7da219525c71c33ba51ce6dd3637fd355f28e265. 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/SE6XY2210364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726187c8eef4118f7ee8fe725462a8af64c8b0b3682a633407194b10c9dddf60. 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/SE6XY2173508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878af99fd00dc46c7d3df96e816775ffe348687b5247a8dcfdaa6750cde14c57. 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/SE6XY2100419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cc608add6b722b58c2d0892b6399ba5d29b0f0f9a95ab89504967a893eee06. 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/SE6XW2143916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a3958ab3b3097e363436dccb33a2b5f6f961d755506e0004d170f04b30e38f. 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/SE6SA2160170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89fb813d98dd3fb33b7f5fda5eeb60021de0ac8d63d972ba5a758be8708ca44. 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/SE6SA2160171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5982f5fb09c26e0e6529f6660c5be4199a5b71681a769386d682bb2dcea310e7. 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/SE6SA2160172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce7f5a9d2103644f31524f00e9e1df913da9e3223e0ceb6104839c3ac38fba7. 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/SE6SA2160175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960f52c4f29423fcd35f910cb0985221ca3c70d0e7b0c61480012d8fcb938d3c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:31:24Z), 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/SE6SA2160173.
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 0xba94b939c340bcbb68fd4186c3650516860f908dc6f07252433268e44eb46a7e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE6SA2160174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc0af7ced508af3c41c1ad331156d7e32023649e2c3f77056a1545d5de2bb9c. 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/SE6SA2104808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bd803f041ee9e92a96679fd3612fc23200199b2001815e2b6164d06fc389db. 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/SE5BU2110049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023338e6a30a228d0393d8c573bec55bada9fe6747cf5deda62fc5a272d24c68. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/SE6SA2062962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1e5c6795ace82973bc37df57f977f083aa8c00d3f21fc3d3b98c834b0eec5. 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/SE6QE2095439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd834db8386f6233af78af461fa403c15f15fb41bbfebb5e198c030465d4f710. 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/SE6QE2047139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d224529f06cc3532527928ded13beecf02e15cabf66ed5d741acfcb00d15bf. 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/SE6QE2000644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49a9fc24e13d7a9fc9bb6679d0865d057a8f63a130b85e6a5eef64b5f2cd736. 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/SE6I32046596.