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 0x24b9391142317ba1c692155150044dbe6a0bc353452f3a2db4275e741c002516. 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/3cdc01c0-2e87-4c44-9e15-0729d3fd2d12.json and https://artists.proofprofile.net/proofs/artist/3cdc01c0-2e87-4c44-9e15-0729d3fd2d12.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 0x4078f39251b372d8a37353b9763c4c6b1c0d8705b5ae05b7b7170a67e5d2e155. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2356913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42138f37a0a8f93a9c0c773be1d3905ebd2fa7f993a2cfef364e28b5fbe6e3f. 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/QZMEM2356914.
A Fantástica Loja de Chocolates da Barra da Tijuca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5373809fd0d1e11b90a5375700e35010e1aae64e01ceec66e4d2c420b0fc42. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:47Z), 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/QZMEM2356916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b887e3728661b059bbf51873e41781e19d1895da530fee15a0fe5254e519c9f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2356918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ce0b938444e89169fa8013f2088be8d5b2522504726920f225e4eb38326a40. 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/QZMEM2356919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15407bc83c9fe78183f22a1d3d5a6fdebebb73f297647e3281549180352e4197. 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/QZMEM2356924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56624337316cdc0fd65a72c33227fed84237aa2a9bde922ef5300b0ff136e55c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZPLS2464875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbe3b33b938465ea63734b449fdcdab4732c6b6d054e896305674aaada09861. 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/QZNWT2470337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc23692b023d8379b14f94603a25a7e339e3de5b996af7f6fe9d9e7bc56dec2b. 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/QZHN62566995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc807b4b20aeaf9382c1282b685ac7c018950758055ffe4c4471bfb6b8b206684. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62566996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8586c75b9199135c8ed7f3c60f00b9146be7b20e14b8ad0465f95f00039f76. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN62566997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6512889a7dbb17a49562c462e2d7a393e89f20e1cc78a9b6af8108fc1fe142. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN62566998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b194b43620eaee0b8de5fcdf68324ccdb7d8a611537af52516b457f5a348019. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:17Z), 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/QZHN62566999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00d1a372717d324aec2bf78b13989c9717e2e65e6fe4c58463e9970490ea783. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:53:57Z), 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/QZHN62567001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8a6a17c3b5a085d2bcc11bf6aae76102f97f153bb50b383c0e12e6ff3aacb. 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/QZHN62567002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7193a7f45dd53ea0c0908266cb575712f4b8bceff7b5983f616cd1b031065a82. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN62567003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a68292df287d6b36e6dd318cb2aa8cb78e894a420d8351d9d0cf0b67535f165. 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/QZHN62567004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f5ddc561d116072ce157f097bea3791e8ecaa61bfda2c87a3e52b9d08f8b09. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:02Z), 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/QZHN62567005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad11ef6db4029e9ef6c15edfbfc26bac759bbfa18bc2b7602d5b23c1fc2bd01. 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/QZHN62567006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2de897405278f3025c4c7b86284831bb7e406c05aee26da5f148fa97db7da04. 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/QZHN62567007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af3d26d5c650fe162be4deba1a6816ca922d541cf0226e0c2e721feb007016. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFP2532212.