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 0x133f40db6ba12ae8bedce8342355cdd238d49aaeebcb108e4c722bac6565b0d9. 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/1a365160-a626-4681-ad2c-897eb10a2351.json and https://artists.proofprofile.net/proofs/artist/1a365160-a626-4681-ad2c-897eb10a2351.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 0xee69dfdeefb93910ef1d4fa570e2974e0f990fdf9d015baacc8ccd21d2b4ec2a. 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/GBLAZ2404167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61638c82f199ca71f214b208151049e693a6edec64b19f49505419be63daf0d6. 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/GBLAZ2301954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61546e891ffebe0e75ca9fac4880220cd42dfa53c0adaad6c8ea881885c9127c. 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/GBLAZ2302024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b7020901ffa9429ccabf49e79a0d39ff427580f961e86c69c80476e1f2e835. 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/GBLAZ1901300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a790ca4d2090d3dc01097d7c2cdd25f60454a353c0ddfbc4d9d6ce3d980a074. 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/GBLAZ1901301.
Headed for the Reaper - Acappella Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff2318491933f85e8ecc13f78176abf6877200fa51d4a06e51859028fc98388. 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/GBLAZ1901302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec683460c61b21a4cda472f1022437e4e13f4190fbe4d10953e39d82ae228d68. 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/GBLAZ1901303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61546e891ffebe0e75ca9fac4880220cd42dfa53c0adaad6c8ea881885c9127c. 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/GBLAZ2302024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61638c82f199ca71f214b208151049e693a6edec64b19f49505419be63daf0d6. 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/GBLAZ2301954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b7020901ffa9429ccabf49e79a0d39ff427580f961e86c69c80476e1f2e835. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBLAZ1901300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a790ca4d2090d3dc01097d7c2cdd25f60454a353c0ddfbc4d9d6ce3d980a074. 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/GBLAZ1901301.
Headed for The Reaper - Acappella Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff2318491933f85e8ecc13f78176abf6877200fa51d4a06e51859028fc98388. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBLAZ1901302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec683460c61b21a4cda472f1022437e4e13f4190fbe4d10953e39d82ae228d68. 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/GBLAZ1901303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61638c82f199ca71f214b208151049e693a6edec64b19f49505419be63daf0d6. 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/GBLAZ2301954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b7020901ffa9429ccabf49e79a0d39ff427580f961e86c69c80476e1f2e835. 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/GBLAZ1901300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a790ca4d2090d3dc01097d7c2cdd25f60454a353c0ddfbc4d9d6ce3d980a074. 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/GBLAZ1901301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff2318491933f85e8ecc13f78176abf6877200fa51d4a06e51859028fc98388. 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/GBLAZ1901302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec683460c61b21a4cda472f1022437e4e13f4190fbe4d10953e39d82ae228d68. 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/GBLAZ1901303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a790ca4d2090d3dc01097d7c2cdd25f60454a353c0ddfbc4d9d6ce3d980a074. 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/GBLAZ1901301.