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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3916f30dcb00a95f796f6a6780639271173441f72e4bfabc35f78a15e4e9eda. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3a03aea-298d-42a7-bd88-ead020a364e1.json and https://artists.proofprofile.net/proofs/artist/c3a03aea-298d-42a7-bd88-ead020a364e1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2643bce607029dc5c7d34cbe2c65d8d94eeaff3ed9308145345e082795a04119. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBLV62014483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a281a745bd7993aa78f5a409b115271ec2bd5d5980cfc06c2d7895625023c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NL1XF2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958238f9646145869eb32468ec9590e706a4bc1c2255281fb1d2bf19c7c7c995. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NL1XF2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7ac15a7f06d80441af9a9b56f9f82842e778cd3da355626f6acd04b9a7f2c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBWUL2125126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b14be0b0a349b3488c1a3b9e109347e8258fe4da97f7c61f1c4c26b67b74b35. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZMHL2095350.
Collapse EP (Inc. Distorted Planet Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffadfa232eff2768517b7354a9d7959a2f4723ce864b874a8d5286da85a00fb6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLV62025846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf41328c4068440de31ba01ac7ad9f5f23887b87551b9bd7a26b8934f2fa719. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBRKQ2224002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6971b1352e4812ad31abac22151c57f5b8addec2740e4d3cf31f14be665f9e. 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/GBRKQ2224004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7561def3f3599b3395133bccd04ad5f6d9710603a1029fcf4b3a19b19bdbfa80. 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/GBRKQ2224006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6919bb2bea081adc393a4521e3a82dedcf3d66ad1fad1288f65f459989cb7fd4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBRKQ2224007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e90f796dc95ae6fa31131d6850cbee1c41d58ba2f18fb26e2c699d8a38e48d. 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/GBRKQ2224008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb6de87f9f19dac5ae68813a4aba3d9a338ad122d7ad4a6787e9bd795748a9d. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBRKQ2224009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d88b87fa5c31e2a06c029c98497a3545810f002a7d9704a2155bef564093aca. 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/GBRKQ2224010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71234ff6aa15ffeecbc06dc260248ff3aee45df9c7ca60624cd5f8567f9a142. 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/GBRKQ2224014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd97625c1281d3b7482d4d6d89d4c92d95fe57feff7631df8fc27988a7bead2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBRKQ2224015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348bbdfc2eb553a383bcd2b6c30b0ecea8bbd0bec5789ff32e87cdbd79528b3d. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBRKQ2224026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7877822de4158e88bb87e5bb9e81560aa6e49c04c39f115517ff8ed3c13ad1b6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBRKQ2224030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550a4f0baf9ddcedd9c2b25c624efc0d4b9ce9b380ea7c27c72b3a71285d234c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBRKQ2224033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9a1d887d5bcb18e8aba6c4e4a415644bed19c08c9103b8c99abe86705d707a. 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/GBRKQ2224036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98ae8ea7b0de7a5b068a18c4976aef9533a9ce947a6736fa42a1dc090f61976. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBKQU2141289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69d0191afd4ae041125af65807926c8a060c54766b9b08cddc383cf6ae20bbe. 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/UKYJR2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e04c870e3454b3c0a72537e2c31a700da688d40672dd481f2b8bc8b9a32b24. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/UKN6K1904360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1d01430eda10675065727dd61d839f6529b860ee9474b7b625bc7e9549a5fc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZFP52073557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37ed6d33255c69661ebe93b80aeba12699dd8759ac595d42b05e9c50dd885ca. 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/UKN6K2003007.