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 0x1115274be0f6e1978d08f21cb31fc0b54e7a1e3735cb6999c04ca2d02c7709d8. 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/22e71a50-01eb-4e06-873b-4c30b972c3aa.json and https://artists.proofprofile.net/proofs/artist/22e71a50-01eb-4e06-873b-4c30b972c3aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Espectrum: The Avantroots Dub Techno Compilation
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 0xc8a5a7de494b5ab30dc68dbd04ef77720e2216ee7c21244e62233bfc99541e3d. 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/US83Z1656112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f65601b625a1c112e2600b14061ed9f60326241225897a54728073ce15a9cb. 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/US83Z1656113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943868287132fd5c55b3509b9c88a947dc7b026b1ce1d98f38f3829773b8faad. 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/US83Z1656114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46949f330582a71fbd70b1aa32950fe8e1e5789e7824e10ff8a9717bd14066cd. 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/US83Z1656115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881122b53bc4561a3276248bf38975a620c9df3b3e943c12cfb98aeed1c4263c. 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/US83Z1656116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc3b5e64fcd4e996f723aaffdbe5220c8fb90dc47cbef2f330fc63bd76efeb4. 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/US83Z1656117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e16d66467877708187d8a3375b6dd87040a81337e5fa2b48560fd930e31989c. 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/US83Z1656119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2691d33ba7b81b49f49ab0604cda9310e0d744f76b9ddd2c5554cc1da6e3f4f. 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/US83Z1656120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38abea2054ed2e3a6786969cd608f728a788f45195a5013ef6c2ec21411ae86b. 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/US83Z1656122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39af25e9192b0c85a7d0f2d77b2e849a2035f63caa6780e6dc8b710430ebef13. 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/US83Z1656123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84f739b707f5706f6f558d8672876de452e892fb02d462dae625f2f2866cd8f. 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/US83Z1656125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca1a71133884f000c4b972d93ecc6f52f4ccbbe7d9946332a9465fb55a3ea86. 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/US83Z1519882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a84729e66b0767e553dcb57c043da584d16c69e621451ed22310701bddebf9. 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/US83Z1822632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14de7d525191d243a053a1597388df5b23877fda1e47a7c9c6cb4ab33bbc7dc. 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/US83Z1822634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0068baba4c29c7b09f90cbc6dd3dfc4d6a15ee70c1f6d8c41ac21ac3f7890853. 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/US83Z1822635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27102a623c84a529ae1ab8f7184eb4d8b401801e20b7cd5be631edc9b688b7a. 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/US83Z1822637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb24daf6d91b2e27e808e1463d3c9d313c11a95ec4c6950968e4c5de4895568. 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/US83Z1822638.
Espectrum II: The Avantroots Dub Techno Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef999ae6e62ae038e5254b92359f312a9545b57b32208d6c514b7afd16fc25. 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/US83Z2111190.
Klassik Lounge Nightflight, Vol. 4 (Compiled by DJ Nartak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f90c050ab1d07a923f76804a7d56df7a428a4c7e44fe51d8f09ea515b16e349. 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/DEHE41000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3707801e51ec7f90afb590c446b7d7fc95dc8ad2a2ed851e632e242833663d69. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/US83Z1822633.
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 0x6a94fa837afcfffbd36d11bb40fadbe07653dd5b528708d61797436fc98db434. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US83Z1822636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c1e71362a9e99b90acbbc2d4b7174aaef141cbb298aecabb8fc909932ca3e0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USUS11500028.
Klassik Lounge Nightflight, Vol. 7 (Compiled by DJ Nartak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb528263d66318068499e73728040e733dd43fcb8e3cb7ee816b109928fdb03. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEHE41400079.