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 0xc3c9e62fc833e0972c9d627178c80c38b2ea71b9c7e675d44a9a86df9b23962b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29dce746-c5c0-4124-81b9-d0211ebdd293.json and https://artists.proofprofile.net/proofs/artist/29dce746-c5c0-4124-81b9-d0211ebdd293.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 0xedfc0115f3779e699903bdf8dafd2283a8e15211d498ddafeb9df391be40ecf8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLB3J1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf008440f1cf2212c51d5cd38cc3f4b3f91aa1c64aebce5f47468fafc350e6d6b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLG661700558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e9d958341bf9e06c12c4168c83d76d4c88300e5df45c95794ff0294346907f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLG661701013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fb5d14c091c7e2dc563ee876118cafaf8faa6fa78f01fa6b032ef326174436. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLG661800321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de65c4db13b1447abdccce6477e88902b78872253052c446eecd98d5271cc92. 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/NLG661800922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1fbec9456b8b336610f7e0a751439827bac97159966c0cb3a724b7152d9e86. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:18Z), 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/NLG661900228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d7a2dddf129ac4787ad1fe361ad4428752491018290f5e5480e31e68d83097. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:33Z), 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/NLG662000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd045f58a02da3ec7526cb1ff9a0d6b6f0678014e0034179b73834b85a2a5ab. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/NLG662000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343e7a5b202320eeec61c8badad6097966b1077bfc01864c0156e03d1a7f63a8. 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/NLG662000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05af599d3a105eeab1f25f346f99938f6ee9d39a31ab0c9dedd499faa3fd2675. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLG662000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed124124371b974be1accef25da28969473ad6f9c9d01c5ea4190deb2e41678. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/NLG662000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894feb1f88ddbf90dcfa12c8d03a3ade570b31777489451c9555a8bf49c27c9e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL3AA2450071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ab258bf59fa1b1d2a52c218f52c8954a45aebe0bafc1d101835b276c9f5c3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NL3AA2450075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe606abe271829d85afcbb830ccb3d93a1bc57764a6685240b767393b0889bcb3. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:53Z), 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/NL3AA2450083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab92aa64598c43925d1cf40609a5381dd5fd27c1b19f355303f5b91074dfb6da. 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/NL3AA2450084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091801f986cd50bebf4d34dcfa790dc814d0a3229a923cbc00c3fcf56dfdfe3d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NL3AA2450087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c54085cd7835679e16a63e92920134c86e68ccd5d6f0139591b3cfa650535b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NL3AA2450086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc997b72a83b7086b2f8d10d9d558f46909d4106359bf1469e4eb92a8c5bde60. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NL3AA2450088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d907acd0073f8fac04aa0451cb95c63fe5e03a5a828f3d4e13d6da5aa79df. 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/NL3AA2450089.