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 0xf761129b5442f869affd017d7d6456f055fdfdc0ce70ba4435ddaacb670cfb77. 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/b97101ed-aea8-4da8-970d-da8f64fdff41.json and https://artists.proofprofile.net/proofs/artist/b97101ed-aea8-4da8-970d-da8f64fdff41.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 0xe1e31335caeef43008b0900434ab46222aa5adcdb6af790d75fec6433c566fa9. 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/NLEH52100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be44f4d51a589358cf17d78e087b4dea892a116e39f0f18b8b6ca2c3129c469. 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/NLEH51900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f85b9fde273f903f2c8fa8f15b48348e2f61abaacf046b1072366cd10be2652. 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/NLEH51900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e89d512c8acc5406f1dc0d35186a5f06272449005612dbcad50c67970cc4e7. 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/NLEH51900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b8e57f8908a892b21ca1fa1d7203448abb12ffb9483cb0ddce2a930a43c240. 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/NLEH51900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d577c8d2b3a333d6371e611424f3e155975e3e0e07dd829f911e76b07e31d5f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLEH51900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecbd26a777954527179b8973f064f831c17e5fde904e6ac28f17896579adf19. 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/NLEH51900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd76c7c665ccf7c676d5d36c7b4dd6c1254fc19bbadab8290acbf742cbbf51fa. 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/NLEH51900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ce9046d0d5e3eeb6347d06711184c09d5b7a38de97393cefd3521c5a5699d4. 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/NLL6R2411823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48753e89719ae905bf7af7400d7cc7472e73d5bff4105664f504a3fb287e518c. 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/NLL6R2301173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94661fd4ad270cc26a9e46cac66a6ce161d46ad61c557efc8ee9be3f6ac797ad. 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/NLEH52200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02e0c6aed02a5b719bd1282f3bd2afeaff478747ea878197062f0f719e2dbdb. 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/NLEH52200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9bd4f7a6217576a7504dff260593189e952bf27ba5688c9497ecc09cd63f05. 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/NLL6R2000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f5fdc4f4db5fe7e25b5dc81e89c67209bc78e2cf7d00660a38e350d39774b. 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/NLEH51700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbc9f80e2ef126313581bdaf52b36f86e4f8fa558d9337d935b88ddf3d8624a. 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/NLEH51700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2309772140b545d49addd49d4d5ed4caa2f8a7f982ebd48306bf4180cabf818. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLEH51700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df3d361b3279c85773ee9f45adc8bc9ef78c80b29e1ede2271d85bdf6ca7d4c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLEH51700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0457d9c68c1ca9ab65021438c6b45bce78e1b4c23692bf4032aa7227be0a60db. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLEH51700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808d2083c2348f3eb034d69294486bd9608ca5f379999fdc2a34ae0317270ef6. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:08:02Z), 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/NLEH51700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf33972c1e33246d25f61535642b8a44d655e11a9683534c7b5398fe0c5379b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLEH51700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d34bf2ac6ef44f6fd87b58b886a1e990803a5b4beb9d60139714e7162a61674. 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/NLL6R2100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc3c751a89a371252702d8df8742a6d4a44acd1dbc6562651297c4f5fd025de. 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/NLL6R2100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2459f1131ff6c5db41a6c9462f74c9cf7be8b652e50356187a09cd12ea10f480. 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/NLL6R2100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33cab5fe9a7f66d97767e5b78b4834fc97c5d998c723c6b38d80175de7acd5c. 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/NLL6R2100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428c9bf5be3af422fa6de66a0cbc1009321b3012b2d9d9eb0a132d7d96f9a0fc. 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/NLL6R2100613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff5a80211d6ce41dbf9a38a0c8eb733ee73144285301c345fc30a4832ef6409. 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/NLL6R2100614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c3d492a88022f3cd6439172f14513da15faf45658b96ecfd85b6898f18ae2a. 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/NLEH52400018.