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 0x67a4adf0439e75c706fc524c2ec08be2b49d2f63e2457a47810c8bd3d13d870d. 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/d982f5d6-3e73-4484-b4ec-a5ea44b11e24.json and https://artists.proofprofile.net/proofs/artist/d982f5d6-3e73-4484-b4ec-a5ea44b11e24.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 0xcba35a9da2dcb20a3ab34b14d03a1f055575c130daa6bbaec344d4a9351a2f09. 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/QZFZ61928841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5855bfee53ff631af81f6a834e3377aa1430da55b954a88f7499b6e0010c10d9. 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/QZFZ61928842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4904e0868d17bd3eddb797a10606c42fc4f6edc46d17cc309f235d8d495b57c3. 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/QZFZ61928843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81c2375f10e159c0320a0e5d37a4f111994e3245b4a8dc61ce6a04e32448fb9. 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/QZFZ61928844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6605bed725855ec4cbde77326641ce611297f182c6c776b66bf3fb1831b01181. 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/QZFZ61928845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598ddf6e2ea86faf62b266122bc41ac0dacbf1f89b02794ee182cdddc08ba57a. 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/QZFZ61928846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b3a23c16f7bb9f0544063836e0287e68710c87559b26ed2d2dd2c924076f53. 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/QZFZ61928847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf790cc72d306e642a88b4047b279ec630c82711c347b2e67639be9e3448b5c4. 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/QZFZ61928848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c67db490d871c664d1d5cbfa652769c21234755a45a8240d14bb361bac79bf3. 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/QZFZ61928849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f66c44c11d0265b746d48b55d000a744c4f4ed0a058b4f40ade55189ed82035. 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/QZFZ61928850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33175b8ece15edf81b32b6dbe7107db3743f1b3f0d0142610f8c00feeb2d2244. 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/QZFZ61928852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153e08e4f6fabfecfee880b201c58527d2e4ce1c2c9b924ac7ae82f7bebd9105. 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/QZFZ61928853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6742f6e7d5d4c3a9280e7d7ed43356f90333ef7511abc51ccf3d6bdc1ce425fd. 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/QZFZ61928854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5700dd10c3b5b250bd896530581c0c414b98d14e804c2a6fd43f37a0688fa7. 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/QZFZ61928855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d78d7278f894bb995fe9488701e47bc6e3f9905b350bfc9527799deb6e19c1. 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/QZFZ61928856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe5e7fee47fa28adbf557fc4853cee627d56699b5bdb6032f0c0b1c8ed47b12. 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/QZFZ61928857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0e484f6f324933f7c44030aa60602ee5fb300216f1c91134e42aa234d078f1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ61928859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e9f85651df221308529f2c9703a1bea6246717ad4f24126e15b6b946f56a2a. 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/QZFZ61928860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bca933c89f7cfbba92fccd641439b24465ccd8372e6ecbecfc7de7675aaaa21. 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/QZDA61913512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb229353ecea1d8189f85abbdc7a3345d3ac541006ba729ac6dca70df4c14a7f9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA61913515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d51bef346d8021d2092f7ae927319ab6e933ae87ccd7610bb31aa8eb2977f8e. 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/QZDA61913516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966aadd2ba35d4b83c84b5eb571955a16fd96fe4926868a3d2bb6d45f901d30a. 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/QZDA61913517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c3cfd181be8d62f6199c2bb258404f97c88c78dc37eb8de0c9f9dc82e1bb41. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA61913518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b5e3b5386d86d05d62716403465663375daa2e49f041d64235c0e93826f9ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA61913520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155cee1e89e0fa47151c867a695d2739ddf01af7e5661715e07b24802ed6a244. 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/QZMER2483289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7db8f039429c0caa317afb2400bf02983cbd663e43ffafa39724f2c86bc3d75. 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/QZMER2483286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155cee1e89e0fa47151c867a695d2739ddf01af7e5661715e07b24802ed6a244. 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/QZMER2483289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d25c12257f2ecb6987f7221e0fa6fea9347ce99a63b2de57b1f1deb7f4ee734. 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/QZMEQ2482176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf621d5d651008a15b9a0e597befc2d994d7221ec4a286db30358d3b582f97f0. 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/QZDA61854131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d78d7278f894bb995fe9488701e47bc6e3f9905b350bfc9527799deb6e19c1. 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/QZFZ61928856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e734e4705236e477019d7bdbae63069b4087c4082ca2d9cbc46fa9a4d2742aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEQ2483943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5700dd10c3b5b250bd896530581c0c414b98d14e804c2a6fd43f37a0688fa7. 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/QZFZ61928855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6742f6e7d5d4c3a9280e7d7ed43356f90333ef7511abc51ccf3d6bdc1ce425fd. 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/QZFZ61928854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d51bef346d8021d2092f7ae927319ab6e933ae87ccd7610bb31aa8eb2977f8e. 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/QZDA61913516.