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 0xc55c3923c2837cbbb2e68fda77c6fe53ced77a9a678650a9a0664221cbd1e64a. 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/ef9f18ea-87dd-428d-abe9-a49a4a48ce8e.json and https://artists.proofprofile.net/proofs/artist/ef9f18ea-87dd-428d-abe9-a49a4a48ce8e.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 0xb84bf8e76670bc768e7ca21353848f97692b073205cc09485fe2baedaf642bd2. 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/QM4TW2435435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae45b087ee99951abe42e036968db57787ae72c4a89e3e7daef163e7efb0341. 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/QZNJZ2302114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae45b087ee99951abe42e036968db57787ae72c4a89e3e7daef163e7efb0341. 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/QZNJZ2302114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb827ac5f7ded571bde03afa2aee228f1ce7b332274f5eb8a130f00ea5860f4d1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJW2300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725f9a85d30f28847f3a077e219ce7c7e97ce908ea2225572e712fa567cec48e. 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/QM4TW2435424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c03fd883eac818f77c7b6f8be2a0d9ae32a32c84069f208416f8f2bfad46c69. 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/QM4TW2435425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6014960ea1ec2de4e01a17b081f1de633ba0ee863ecdccad76625cf03c7db1. 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/QM4TW2435426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee03ef415a93041278808ff9b270094e3b41b1be37226a6c3229e3f9b1a3153d. 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/QM4TW2435427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f278fffb45dafc87055000570aaceda0f217955b64876b868c5daf78940413e. 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/QM4TW2435428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e0f2194bb9afdbd492be899b21e140c2141e152b06a027deb4cc03cc1fe45a. 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/QM4TW2435454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa790fd05d66ab7b23139b9a6714454bae03e209b59a3a7dd3b274b8ece225757. 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/QM4TW2435430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e1b03340d27a9a3db9c4ef1a504fb2262c7f1466046e42847f0e63d57d037b. 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/QM4TW2435431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dfd1b4dbd22dd81c3f5ee9b63fb45b5d8df1d465e70dc526fb34db205b7600. 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/QM4TW2435432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc26417d0a22e1567ec3d46c1bee4b3f325bd5a2edec67b1a0c1978e810ad0c. 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/QM4TW2435433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92752d287fd1d61cf5cab68fd0e77f7777ba37b68fe3cb1e9a93958c29f7cec. 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/QM4TW2435434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84bf8e76670bc768e7ca21353848f97692b073205cc09485fe2baedaf642bd2. 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/QM4TW2435435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dfd1b4dbd22dd81c3f5ee9b63fb45b5d8df1d465e70dc526fb34db205b7600. 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/QM4TW2435432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc26417d0a22e1567ec3d46c1bee4b3f325bd5a2edec67b1a0c1978e810ad0c. 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/QM4TW2435433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e1b03340d27a9a3db9c4ef1a504fb2262c7f1466046e42847f0e63d57d037b. 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/QM4TW2435431.