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 0x01a77e5e605310371e551ba0e7b3c8c9da584bb223ad4b46b4ae313613aad250. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/347158a3-df4f-4d25-92a7-cfee1fa8d81f.json and https://artists.proofprofile.net/proofs/artist/347158a3-df4f-4d25-92a7-cfee1fa8d81f.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 0xdf6d39a2032360ceddffc6bbcda1ca7cd7b8e2141990e5b2e7afdd14ed087e3e. 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/USA2P2317491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f4b81f92bcf3cc727630ba7df10ff7e9c7e6de7f33781242fcd2cbead21115. 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/USA2P2317496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347d8f3c26edc9023cd7e05b36e8b537d80d0fabe3345bcd3d2a468a6bfeb5b5. 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/USA2P2317488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8aa912c8f05bba5682bc98f6f3160ac5b81588c0accc60ce81f956bb12c321. 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/USA2P2317489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0bcad136464718e317047282046a7c19cba70522bb0b25206b1efae0f0fa91. 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/USA2P2317492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264e2a7086a2f1ce1366fb8a7d2519e68788c7e118dee631f04ff89ae17a9e3. 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/USA2P2317495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b3765410e1482b0846282d78408e7061ee0edc293d08e6b94e3dff8afe9595. 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/USA2P2317494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b6d3697d583bda52b66f4cbde054b159140efae37fb7c0e0fd276010bc42e9. 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/USA2P2317490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94acf536ce6ca0d39d26eeaf41647be5c69962c617a32a0799c31e5ea1e2d5df. 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/USA2P2317493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7815e1c901bae2c10b2b7d6090ba471fb70f1e538f870dbea8f5075d8b138484. 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/USA2P2317497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446c69750a32dfea451ab22e64a5d5129e9b5e74a0467fd0a3aabd4b0077b4ff. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P2357663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff0d1f38bc535efe54f9061d373faa1d8643932ad75fefcc8b51a8c1827cbe8. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USA2P2357103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac9460544411dc1fa5214cb4decc83a678882bf5ea4ecd078435e160f99a21. 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/SE4W42000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122f398d705dbcca5b4f8a2b75e7f3e642f980cd71d068092e3e5f92c653705. 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/USA2P2350483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb764d2ae1d3f0f87ea4e4b15cec8f8ec9dab0c38a427ba8182543b856e8c0ba9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2342891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807400fa053380f69da958265a34283a5a6e5c1a17349d5f01a4504e0b96af34. 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/USA2P2312500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a733618b324003682b7a1a2d7c4a7800d1442b9e5adc270d29b9a11d2d570. 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/USA2P2227889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266c0114f5f2866f278b8c66eedeb70e6ad104185fccfddacb1a637070c8945a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2227888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979d88c3ceda4e8f4ae28bcf1dab1b44c4ae7202cc1fb0bf62a3610aa841d1aa. 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/USA2P2220198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6a6212353292fd001a15a753f825878505820d39df784786388293c65ff6b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XX2143923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60c9c2bd97fa1cad3095dece44b8dda9e79a094ab8c0fb846eea3c66d877e94. 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/SE6XW2133520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049694e1e055fb6e489ed53d9305aba5660e4047290f51bfd3dba10de36e5e6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2124305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac9460544411dc1fa5214cb4decc83a678882bf5ea4ecd078435e160f99a21. 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/SE4W42000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23d95038ed831cfff7807f7aced3560c94582cd6e31c49f47f6ebd7028992ca. 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/SE4W42000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c03ba9cc69cdc6c209d3e7b1e78ff0b332ca0f8db525983d58800032c566709. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4W42000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99acf1fce193c7831f3c138755a2ea02bbf9a72073757030af9d9704ca74f85a. 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/SE4W42000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b801a676c9a60b51aec12eb3ee8e0cf7d6bfc6a1a1a8451dabf4438c60f6d1. 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/SE4W41900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda664613e799bb9539cd45156c837ad99d7e21d8e3a2b95d516028211e2ef828. 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/GBLFP1933296.