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 0xec4f24e87d98f51752ef96e2277a176b150201e4aa549884dd317743205a0363. 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/b8dd8439-dcae-4b02-9bc9-fd085400eafc.json and https://artists.proofprofile.net/proofs/artist/b8dd8439-dcae-4b02-9bc9-fd085400eafc.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 0x4ddd2b2ccb7cfae5f808d25d62aecebe1d2ad0e111a1f74b3b065509229c0c21. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES91924788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a5645f282eeb965f5054fe64d97a3bb38559f11231d4fd70ca84b72996743. 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/QZH6S1900441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff943bb5246dd822b8c543dd627401fa5f0ad0573c5a9572c249e3bccc06cac. 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/QZH6S1900442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0dd97b0b93a74f97f2c774e7592479c5edf3f27d37886bc484581d1faa53f1. 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/QZH6S1900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caca550b790bf3e7777206d95cc9f3d8b206f132b3a97276acac0b2e80d99a8. 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/NL1LE2302879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58dbe8209d282dd932e57e5c76e95ea00c157339b3143a3328f1dc8e17b0091. 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/QZDA51948233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d3413afc99ba07e89aaa3db18e3c41c767782f56e36903b0ed448a25a24dee. 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/US25X2201015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3a56793d7538a0feecfac4cb4d992ad5223cb3359b4a005f5a750debd4c103. 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/US25X2201016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e72bfbd987c047a169511e61c05b6d80f43da9656639458aab7517d4511053. 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/US25X2201019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977a6de4844d1482f720919435ff05d9a34ec9bff90ecab8815eed1069fc60b6. 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/US25X2004457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8a471d79dffc2a43a5746314816a0d80a8739e420ca090fac7bf0d5093be08. 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/US25X2004459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcdf06be8d0f5874e3c9c7fc8fd4edc5b21f78ee32703cdf57ae86600b39f80. 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/US25X2004460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb789649e163d6b50eaa903974f7f77bdf56e5d3e98537e2f8cb1ffde04964e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US25X2004461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347ab37d92a0a7f9600f09e4c626ae19ae9f411906c0bd21cb07cb2df1a0e665. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZC5P1800203.
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 0x1bb8775058c9783aa0860ec6d75b838efc352e450e434d1f44b2ae98ea7ea1aa. 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/QZN882125829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb5e49b831757d5f657652ad1ff416d144e409eafd751b21131e15f5932bd82. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US25X2201017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2592521a6059587a42533898c92cd49ea528ea4037dd751a3ea0a61ea59c4f73. 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/US25X2201018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95724644edfd69b2e73f5e2ab2e2a6349dd7aacd8961ee37f97f2e41f41d0c82. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US25X2201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7cce80d0017c36f3aec721f2f3e43eeefdabe08a37abe1bddc3607ce9425ba. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US25X2201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31b81241392e5460c91566ac5d9b85a5156738a96a20ac2430e4c633c6f39f6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US25X2004456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99696866eeb90dc63f4c0e11d6b037ed3a6a02743eacecded6fc4e780cc12505. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US25X2004458.