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 0x98bb036319ac120e42ea733d628c54acc08d751c28b3c2379525803bb414e19b. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8b5ce6a-a8be-412e-8c20-3888b96d303e.json and https://artists.proofprofile.net/proofs/artist/f8b5ce6a-a8be-412e-8c20-3888b96d303e.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 0xdc9edb650e99619022b2c3bba1c5f658473f5887a489c039637b988ca1d85145. 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/DEP961900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd918f950ddc3a696c789feda4ff6f223d9d5daa65aaf1e47ef6fbff820c34f29. 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/DEP969901016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb98c0dd2ca51f935b3805a0e4592afc38f446fc884eef74fd03cd93f5f52e4. 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/DEP961800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07290fc2fb36c30edc53ffc6e040775b58444812ab0e4cebefe6659f8b6c44e8. 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/DEP961900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a50033ac6f6172224e19d7e1ea8a686b4de0af229151d51fd75e3e8053134cf. 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/DEM099900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f5c1afc52d9669ce3927132dd4271f4d6c2dfdfb7a1950d6f3dc67ffee4577. 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/HUASD2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6a12b96479cac83cabe8c5460402b7f33215d8fb502e73bba0386e2097c058. 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/HUASD2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74d16b71ac5c87abe265fa019f4bb114c817dd40eb463d7d4aa747df4d46776. 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/HUASD2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8396a4446d9b51f8b140ef6fe2892b6510425fcb5f11369066567e00bc401f2e. 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/HUASD2300003.
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 0x4557a9eba0a01e36b2d5d468639ea91e9b428b8fa1fb9f5f406bac6af19b8db3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HUASD2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960f8d4946e7663f4d1b7fdb15109be3fb1d382987d838604a46621252ffd1e2. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HUASD2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6c7ecf348cb61fcb6eb95569b58dd23307b8e11dc04e9d9ae88cd111c7a238. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HUASD2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f26dea14106dd5b65664f31f7e54cdcec98b17c48a93df3b059888694de57e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HUASD2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa539f2a4d8737c498e40aaab4077896e6933692a3a5cefda11c7d882fdc567e1. 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/HUASD2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06489ca3860465ae872841bfad2690f52bc30b393ebbf5a3229718345e9e17ab. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HUASD2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61844df957416b1a454be9df065ba9060b7504357a62ed7ac8765e9b5b30e3b0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HUASD2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6285180c3c94acc64397e6d0c3bf51eaf41dbfdf68b151491dff6fb7cd316328. 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/HUASD1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820208d9040bd64ac5fd779c149b85d77746e075db2caaf93be65f5c814243b5. 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/HUASD1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6466e75ce3344b135bd2f173c88f68151a3b2844dff2059ddd89adb4515e2540. 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/HUASD1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480b9e2a0f70658e82a2e5ef982254b30ff846e70547587587b5e38ee1c85c41. 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/DEP961600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c51dc3aed3b833640733c5f5e9b2cbc3fce4d42390c020c32547143d7f0260f. 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/DEP961600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6870ad13fdedfaa610926bbfee4a942bfae47f15de047998572592a060990db. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEP961600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3d8ca5790f371ae775faea33138e3fbb18e67ca7cd9283447f72865f049e70. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEP961600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e7b76f285a7ccf86ee04975c65fda005d087bf45f18c1fbdd9426e090ac9ef. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEP961600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a98843ef410069774e0b71eccbcdf1279237615f9d2cbb7b40d9225c470179. 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/HUA611300900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82de79463b2b9a3b5ac2efb9ceb999e08b262f91c80906ba277e39cf11c130fa. 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/DEP961600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029066445c3d454e3fadbe66eea51e1c7e172585e9b619e85b33611fcea50e65. 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/DEP961600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404ae44fafe030cc24a2c7178150e32679caac961cc8aee29cefe0400623cb7e. 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/HUA611500277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e498928aa63d17f9b7f99db07820bc6460799deae1c59d88300d98adea16a6f. 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/DEP961600044.