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 0x967dc8712037dde9e17ae0437d4d9d986ac92d082e19ec6ce5b6b6db5076e612. 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/8ae2dd34-2b07-47a1-b14f-10c22b2e78b8.json and https://artists.proofprofile.net/proofs/artist/8ae2dd34-2b07-47a1-b14f-10c22b2e78b8.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 0xa077ef8f92b450f5bb5ff8e56c75b8a42eb09ad253c853a2ad7bc2f6a840a86e. 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/BCO3C2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f5ed660e63e4134b20898412b8c69931162712b85d7b8ca15dcae651fd150. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BCO3C2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b4345071a3449711c0586ceeff265801c69693519f554ffa30cb3e2c6daf5. 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/BCO3C2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73445e81fde2d036fb574c278aa1f6b7848aa33c990a0ff39670fe6f31f9a4bd. 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/BXVDX2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b24b144bd526a5c47d6145b17bfde1ef5f1ec4b1cf662f5585e60cf33d3631. 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/BCO3C2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef83aed8702cfc9c9f47b879c0bf34f141b76e1e02fc9a8a3586c3095e23aa3. 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/BX52E2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aab0d7e6f608577c2765e25d421994b46e873cf1f93b2a634e9739bffe212f1. 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/BX52E2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6db709c4a1daf04b15d73d79169ed3cdc46f292f802875876105c6856c8f7b. 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/BX52E2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a15a1190f388209ebee7f5bfdd72c750ce37f8023104bd27572887b7a1e01a. 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/BX52E2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa737c52fcaa4089e4446066e6fb9c522bdb8f9cfcbf07ff9ea08ec852dde589. 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/BX52E2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6db709c4a1daf04b15d73d79169ed3cdc46f292f802875876105c6856c8f7b. 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/BX52E2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a15a1190f388209ebee7f5bfdd72c750ce37f8023104bd27572887b7a1e01a. 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/BX52E2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef83aed8702cfc9c9f47b879c0bf34f141b76e1e02fc9a8a3586c3095e23aa3. 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/BX52E2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bd76a5b2b4ebfebb4ed31f93e40da7f203af7654f10eb79698ea41fe959156. 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/BX52E2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd411155266d4beacbf713da981281c0a69814179623f10722da3b8953489d579. 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/BXY6E2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15ccb60531cf7a3145a0b62b54f9f1ab2f474627fc6d8c895cbc99b83ff4cc1. 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/BX52E2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70897e64698496748cec46b781c1a1cbdd64db7d76f54be493cc5782be4062a6. 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/BX52E2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07f5ed660e63e4134b20898412b8c69931162712b85d7b8ca15dcae651fd150. 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/BCO3C2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b4345071a3449711c0586ceeff265801c69693519f554ffa30cb3e2c6daf5. 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/BCO3C2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73445e81fde2d036fb574c278aa1f6b7848aa33c990a0ff39670fe6f31f9a4bd. 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/BXVDX2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ceade755695de772e2a4816d5fcf9c899f22f3ebfd5b01da5dad89f6d4b78b. 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/BCO3C2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b24b144bd526a5c47d6145b17bfde1ef5f1ec4b1cf662f5585e60cf33d3631. 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/BCO3C2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b0985b043bd076413a2f19e9e46304a31cde93ccb905d5c2cee1ce33dae00e. 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/BCO3C2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb75c1f594d58175bffbc21fca4572480142ff2fe592b091f6597ffa5bb95d0. 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/BCO3C2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60628438b7f3e479dbfa974ac2f1bf1017c71586b109434e1f58d1866cb75c08. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BCO3C2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e3286359696f0446ef91e3d49e19fbc0cdc9dbfe10b76af826fcc4d454d8f5. 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/BCO3C2100020.