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 0x9e44e66171ab69c9190fd6f3de806d147fc43cf094a042f2b79bcc5f76ac059e. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54f91fd4-7713-4371-91e1-3d9644b32fbe.json and https://artists.proofprofile.net/proofs/artist/54f91fd4-7713-4371-91e1-3d9644b32fbe.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 0x755af2d61b4f33b5b93d31311a7174652fea0cc7bd81e3aa15cae12e7a8e3bac. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:04Z), 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/QZLBC2505092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699961d84255c36c81a0ad4ed5bf3fdec12a2f9c3288445b3fec37e937c90ab8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZLBC2505208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a4e4ea55af5fb2b7fc5a8aea6cd912b9235a77150bff53b483c1630aa03b6f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:16:40Z), 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/QZLBC2505210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa3ef8a0fd198ec24b146594d15e6a7bd715ad7dade06ec04dc222b75ae5b44. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZLBC2505211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7f91697a1be731785a40801a71d2accf574a2fb87b00ad3c1dc0f531362c60. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:20:00Z), 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/QZLBC2505214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef397cc5cc602333027499147f4107d17111a569fecf9ae01174c52aaa10ec64. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZLBC2506978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7503ea5b0cf8c8e9c4338a99701602c55d07fd24cfe6a80635c621b8215c6557. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZLBC2506985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade6e49946e949ceffb5731e3a4f767cb2c04393df964726eef69e49d61c2ff3. 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/QZLBC2506987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114a424cd84c0c50522f7006037c1f177485dbd645a9ab5e8e20f60f4cfadb75. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZLBC2506990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf39b5820f78434588e5e590a290a335cc29a8086add4b9c568afc4703f3ea67. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZLBC2506991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5e167e228279acfafede4ba30f44a6426ebc29c4ed8b317c773e370bf2351c. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZLBC2506992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ba40ee91b8f34e2b4ae2e4d6f4c8c2085fcaf15ea8bea85538a91a2ff5376c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/AUMEV2578166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d247582fa15d9b9a9e8b0f2dcd9c475ff5de460ea7f950863d4741c148c388d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:46Z), 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/AUMEV2578169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686906c649c22461cc6be48ffadec5222a609bb899ea2f1ef6f28758028ef69a. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/AUMEV2578182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e598f52d7c6b82b959c5433d6b204d3bd64fe4392826c8b9b136f362c9a490. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/AUMEV2578185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e63bed972e7e4abe235a34cac31652f699280baaf9e236a2b08b7fef27f114. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:33Z), 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/AUMEV2578190.