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 0x17e03c6460d6acde8151d581aad7eb98536c5d21fbf121a9ca0709a645918ee6. 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/36cc9266-433d-405a-9b9f-4fbfdaf5dd92.json and https://artists.proofprofile.net/proofs/artist/36cc9266-433d-405a-9b9f-4fbfdaf5dd92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heathers the Musical (Original West End Cast Recording)
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 0x336683bc34cbef49fbc92d39cbb6b965a890095c4fa675a20740770f2ccde788. 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/USSK31993198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1534beef535c57bf33c40d2d329c24e5e513c113f851ff26abf480020b640a67. 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/USSK31993187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efc19e5d19bf9ec8d8f681dcab6822e9aecc5cc20d4738a73200e3890a1bc1c. 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/USSK31993188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de42cd5b111a965832aaf9ecce8ac169a601b3493ed23b73133f07f6466d28a. 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/USSK31993195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017a7ad56e75632f4fa357b6bb2a86b6c9e595aa001d2c140572447facff2b3a. 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/USSK31993181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304f8f25df168a7df84edfd68f86f1adf05214884e38aa5e655a4b9ef65d3260. 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/USSK31993180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ace3f6b79cc37643e30a704226e762e0e572a20e3110430a40d6bd18a9331c1. 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/USSK31993199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094eaac1c36c4f8bdaa141fae8e17919fed3ade7de3b224057081cadd1eea065. 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/USSK31993182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a20a959a7cedb3c6b2f4177ebe4e551b64294a4ce2436dffb3ca3aeaef3050. 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/USSK31993189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a83cc505c63510fbd6c2d18051eb086b38022e86366caaaee2c29cdaa54c5a. 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/USSK31993186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b911400bd1ff1f21122659a04d0847bc42c91b35c47d8051f11eb8c869cd4b. 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/USSK31993190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684ae66e49b5694e0df20a16316c81b9dd1a19908c49972807314f7481a2c9ba. 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/USSK31993197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fe3f4b5564adf13f88126156b9b436377aaab40f9bed1878cc6604b0df602f. 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/USSK31993200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048d02210fd4c2f05da478e7b27a7fd31a999d4bc1aba14001d7ae66f3690672. 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/USSK31993194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c3868a1e04a6aa576af9e5bf6fe31b62b4def9208b5a4bbcda7774a4b63fdf. 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/USSK31993201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe28ce49cdf36453e891424300a66bab43e688514406963e29fcabe5d6cabcd9. 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/USSK31993192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336683bc34cbef49fbc92d39cbb6b965a890095c4fa675a20740770f2ccde788. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USSK31993198.