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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 0xb168bbbb7eeca55de29a3c9f61ca151b1a1352c0a7e849f840b42c99857449cd. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35e47e94-393b-4ad8-8fe5-938c3e16dbb3.json and https://artists.proofprofile.net/proofs/artist/35e47e94-393b-4ad8-8fe5-938c3e16dbb3.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 0xa3f51f4bb2341b236a37f0eda4fa957ec6a2b146ced755e5a4c76bff2393adef. 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/USL4Q1862421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3c9a8cf235d02b905cd495ed28bee17292751d378750bbac1bfbe6333326ab. 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/USL4Q1862422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f92c84c70f5a53ea09cf3a00901b0d91f5b07b2e977e480bb7e0f0b4edfa6b. 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/USL4Q1862423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d78f0ebf96e9d24e8803c8c55fad627c4105b93f483349d01ca12b5b19728b9. 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/USL4Q1862424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94acba160a105f91ba435de422559d0029ed855198975decb703d33f1b65b52. 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/USL4Q1862425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81cec53d9e31b98000f69bcbe575e3cd63521cff6eed210d6e219e89977cb9f. 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/USL4Q1862426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbd1c0f09c692110f7465eef1a0f16aee9898f7fe7741821f4006d55a12b503. 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/USL4Q1862427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b568bbd0d0dae7fec4cd129dd9be54574c01bb1e787f149eda6bbefddc8e15. 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/QZS7J2222477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3f9a63a97b018da09cb9d5d085436fc73474b9068372132fd14ac607ea8f44. 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/QZS7J2205888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabf6ec9ae25cbacd28f6ba80a526c234b07e509e5f2639a0f9c60314f17feac. 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/QZQAY2389791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a76135e29bbdcdf17d6dff3369498bc5ae2687c8f613e00eb20c575b4546f62. 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/QZQAY2325924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c4da9a42cb43c74574c5d44d62d615dd032484208e58297e30d52d24f94eb. 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/QZQAY2306235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83e2ba432eff551c3b90790584c8650e926b11ac6ff971ebe214e455c806983. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZQAY2353601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ef1cb59a6ee02b1938a97f67c866ff74a4a645ecb39dba8527de021879abf. 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/QZQAY2333782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2f163f71dcc7e1038a4c4311990638c4642de7529665da15ada7ec49185790. 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/QZQAY2359748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabf6ec9ae25cbacd28f6ba80a526c234b07e509e5f2639a0f9c60314f17feac. 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/QZQAY2389791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b25930794113cfc716ae5d718e2b63057a627a605adf9c597290a7b63295fd2. 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/QZQAY2353751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4a002ea364fc11272aeb0f5086c5bee7c3235e169e78f01c7fd7343d8647a1. 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/QZQAY2310661.