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 0xd519abd63ec4ebe3d5a0a9d183829728a9e8faa1e504149912b6d861dc3b4524. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e14c796a-6155-41cc-a579-e55703db8be3.json and https://artists.proofprofile.net/proofs/artist/e14c796a-6155-41cc-a579-e55703db8be3.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 0x83d6403dc761a54df60be2564c38daac3237defe7b5d0e41d0f29538e2bd85b1. 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/QZTB92486415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b3523129802cfdc0840cfbcbf88b05d03a170cbe973816f97d96841f5d6ab5. 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/QZTB92488531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697935ca5d7bea78ba8983f0fa1072df3ff9160f4072d1f44f99dbad44a0574c. 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/QZTB92488532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717fb4c4991826a1d7ead4bf33d2259294d975b0ed4583f35677f9f705901ce7. 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/QZTB92488533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d1270229ac90703632b46d2380812789a1f7995ad2e2e2e960ac7ef7fabf16. 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/QZTB92488534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596f7aa30c9a02732047d77f9836c19f012d2658139eb0614b96077b8a4a1cf9. 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/QZTB92488536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d2c0de7c33566b96cafbeaf4769670dfb156338dfbc98a5f1dec56b25e9b57. 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/QZTB92488537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f062c380c31cac143e8fd88bee9902bb4858096ab515f079bf6c3cde62da7af. 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/QZTB92488538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7577b7ce5feef6d258749f8dd3f2107832e166486248a610eaf2d8b7434c58d9. 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/QZTB92488539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38db37d69b59c461c39830be3d6a0f4e13c13d730cd15229ddbec2e44878834. 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/QZTB92488540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0828bc2aecd8347b2918bb3c3c47fe4bd9aab1937d86f7fe171ab13582743b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZTB92488535.
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 0x5ef4045fdd126b46b7936116c617ebb7b00eeb8eb99b782ce87d4af206c088e5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTB92488541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca22b2024d0751384c7f3bb69d4dd40e41ac6e7ca5ede7c82b358f5f2c8f13e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTB92488542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545088252cca582aa1bb27556f539fd657a3ad26f2e3f11326d6aab55c3cc4c1. 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/QZTB92488543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f03017af274e754899b1e00501ec7944bf2e0995cfba4fe16ef380c74aaeeb5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ22085665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97e1bfc1b19e4c9f2c78d26c9a2a5014ab16b7a618d7b96b0be20b3590d628b. 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/QZFZ22085793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c51348871ceb770d6291d22610969a8bc55297f96c1e9392f0794eb24d7b3d6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ22085792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bef81f89757f898f55565f07b629fd0b0fc03edcdcf4c3177c0e2e52d1b4e9. 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/QZFZ22080218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd353339833180bf869aa5a379d011798c7042cc4d1b6842a3c7c2ff4a5ddc7. 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/QZFZ22079385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a23d2c7cdaf8bdeffb85c577dfaeeceb956f2502083291749b54b0a5e258c81. 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/QZFZ22079400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e41053ddc4d5f86d4b3c3b616d723e6c0819fe66eec744cab4670a41f0dd8d. 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/QZFZ22079395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0d4f2bfc8eb9fdbecdc4e06710cd3b32a60074027fce45b0069c2ca20d24a8. 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/QZFZ22079393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabebe34f82583c50988b6668eb5a5dcd5a9eb949b7098535edaa19d3b0e2f337. 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/QZFZ32039303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249aaf9dc07d9b58a53bf218b6d08cd4d05f805ba766cda9374dc5ff30c6f995. 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/QZFZ22079386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0d9b2ad3214ab654e7050fa7c6c4faa4be8e828121b3da5a7aa09c29182f31. 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/QZFZ32038857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2fbfd5134fb7f0ce95c70f8dee6eddb6bb92ecda15b17fb507a177791f8abb. 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/QZFZ22079398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c88e474f2027da390710bea624c047670896abbcd58eb9c5ab1a034e0ead8d3. 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/QZFZ22080217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aae395756871261565a220ff97c21cd9d73d80a9701d6ed05a57ce818d4302e. 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/QZFYZ2042393.