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 0xb661d075e9e0a0f093ebf909d840da0433c6e081916b23801752f5941be44297. 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/21ad3970-02b9-482d-b6e4-29802a42c295.json and https://artists.proofprofile.net/proofs/artist/21ad3970-02b9-482d-b6e4-29802a42c295.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 0x281c5d58c86d96b5e1f4b11720c0d717a79732da7725ba00b22bc0d2928ed0f3. 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/HKG732281800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2da8b456bb2625e23311b0dbfd92d36c8ba9a56e15cfc21f6fb743d6779c463. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWCC32202149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc07ba4867fb85b2f1f16382e6b0b4a6752835bac8e742c4debcff397763621. 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/TWA472474001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8447e29f579248acd933857cbc1ad47c533885b2de2b074c2d0013ac354ae9. 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/TWA472474009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b62064897cdd7ff433c90ebe37f7d596db78ebff0f5937b06c3047cda28a5e. 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/TWA472474002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374bb510dc51fb8f0bcb5bc6966739ab4aec19957b7631b267a9505de7b01cb9. 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/TWA472474003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cb55df3dafbd43664e3402c4d151dc1f075b70352a2d68e1f02b3d5ad491c0. 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/TWA472474004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97e9155daed39f995df310366e3411c022ab066e0797d1989a7ced8a8b28410. 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/TWA472474005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba5d6c979874242b86601104a5e7ce05a69bb4ad2b6dd447960c89b2bc8a5c6. 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/TWA472474006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260dd22760fc510a6dbec7c5d68a0430a439f53085b1f8b1a0f58b45a2e4db9e. 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/TWA472474007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14811795eec91f00e33f06874d86111a2220445059c36c4c5f08c05445f88e4. 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/TWA472474008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc07ba4867fb85b2f1f16382e6b0b4a6752835bac8e742c4debcff397763621. 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/TWA472474001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e741f16681dfb01bbc64ea29055d6018863fb7723c48f926e26ce83705c647a. 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/TWA472474010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0233b7ed640d12dc1bc46149b80f9f88bedb84629192a2f472e42dc47bfbd591. 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/TWA472194001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30547d6fd1309c9eb65356f09df2d5f1d41ab2c324d70acce0f5bc4b6c03f485. 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/TWA472194002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc08b0862df3b15fde5beb8799f678cd293aac9de1f275faa8ccdb8f5d880ec. 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/TWA472194005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8187404ee1f40f2e99d7a741073fc6489f13c30a447e090d129627dea0a49f2. 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/TWK451400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad19508ce77453fcae24a134a0cd0b4fc5f999dd68fdfba5732eed6171da561. 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/TWA472218005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30547d6fd1309c9eb65356f09df2d5f1d41ab2c324d70acce0f5bc4b6c03f485. 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/TWA472194002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0233b7ed640d12dc1bc46149b80f9f88bedb84629192a2f472e42dc47bfbd591. 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/TWA472194001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19e3278a7ef28c6244c15f66330cec49bf4b1a0846e4a7bf98390d36a75e0c1. 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/FRX281950597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa085166b5868080ad03b98c8b0fcc0158d08b43867112346df29d5ba9f78fff1. 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/FR59R1944553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1baeb1bbec7a2d60bf93b4de7dd12cf962b812e57d1d59ab0c5268b11e97a69. 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/TWK451200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9214ad2114217c066b768ee5c06fd7a5f882eced86be3f2c9f887876273604. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWK451200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b4147eacb99c501fd5883aa68cb4ca7f236c9cea5c3da28abd1f8a2515a129. 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/TWK451200012.