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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 0x6b24d7d549febc73dc836da4a82b89c44eb480df394d5f36f4b990f405b8d93d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/858b5067-0e77-44a7-8768-ee115efdf6fe.json and https://artists.proofprofile.net/proofs/artist/858b5067-0e77-44a7-8768-ee115efdf6fe.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 0x6683f6eefc98d132623a797fa1798ea7393cef8780b8f6a84d40e52cc336646d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG481810351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6683f6eefc98d132623a797fa1798ea7393cef8780b8f6a84d40e52cc336646d. 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/HKG481810351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf9270a303fd2699946e84fe33de440d430262ac48af27712f001256a84485f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG481810377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293173c6fec27ba29ff389950dafbdde59cb28f01cc92dade5719eed026a88ac. 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/HKG482010445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04ab3bab86db35540765ee325e610099491ac7837988e6087b4d781f4f1a9c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG481910387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593e7e3aa91203561792b7dad35fce485de861b3722ce28d7fb1c38d2f3e1e19. 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/HKG482010455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e9b5c3295914b608d8a7a07ba22355531b21ad199e751c5d984896bfe21a65. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG481910410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fb4ae89648af5ad3ce1c91c95782fd55acc4660d12622c1f1c8310044faa21. 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/HKG482010421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4300916675f53f7c3ad6060421f0987f46cd401f76e707239d36cf8b9e9a9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG482010437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e868fe54c7e65ba9f220a52910b32f27cf8cb2b6bfef5c302d2521caef6cc97. 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/HKG482010439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caca04b8c1d5e537fb536f77a1ed03c257135676445b78da73ac17d7abe56ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG482010454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c7e584fc99157e7351d60826184fb34d3cceec9a0600b8bd56c353160d56c2. 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/HKG482010456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ba12dbcbf1b0fcf79504b56299c71d28bdec269885726f832afce91ebfa41. 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/HKG482010427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d898881bf3a11302b51953b08fd511cccf901eb6b2c8e7f958b0abdfcfd4aa. 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/HKG482010440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704979dc0c67fc40191ca014538b3cc4df54ce3e4c5b6f1814e2418a43e86505. 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/HKG482010448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d59ceb518aa07140021f226fdfa3780db16e1c5b5a3314755b2024bf7e0d5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/HKG482010425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bc3e1671b99c40008a8201fe33866534fb42c8af10e8c14de4eeee220bde4e. 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/HKG482010443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83229bd0c7856dea0de0a6d15f2da2fe087a4748885433f539a8c6479b06a55. 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/HKG482010447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535ff55b171c54562fffb23c11ea003afecd886e332aae8045a6670b5c667812. 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/HKG482010426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea037e068786e317b1ddc518c3f06698706aa2306268187aacab80ea7950b6f9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG482010441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89466a78259209dc354ec3c6f183c133320fb488e4c35d2d09ee11278e97e7ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKA412300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3956c6ec18029ed01096d0d6e22281cbcacaf3100c415126d3517cea3c09915. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG482310797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb91f846601cd32bb935d4cbd0534cac029781f9bc7b4d2d276f36de64e4be1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG482310764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc886a3c43d0e247e1d640c6a4ab77b7b210a4db1d9b797158f949af94b45d412. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG482310730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5b885fefa62484b45a2bceb45de0865b1c2ba66842da3b54e8cd2a95b4014b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKA412300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1258bdc81d5ca819bb89c37d6d4fcaaebb1a6d38f9a9aa0d24791f98c4168c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKA412300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a50698973fcbeb541a65a732febc9d7f3e87d2e36123001195624de39ad46b8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKA412200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133c51c8e9b43d26a6c17a62c1f8559779c5f977665b5603673325c0548a4f68. 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/HKG482210663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848392fca8d3e5f0c7c0062c636c77bc8d83820c5b4634216cd6f2b2e45d35a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG482210622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070fcd0d9ffa5ac4624695d4d3341906d32e70a3495e53a3f3d8187a6b78f5cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG482210608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ba8b33fbd2986df72b38368518d7a319ad87a2022a008a1375247ebffa8d46. 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/HKG482110583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81d7a7562ce4285a81f73ebd266792fcaf7d4d1f02e16da56cd33c4c21707b9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG482110577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b1c462c0d719ac6964d5c510bf8e368a8a15bae6e479b3a37ad683eda0805. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG482110485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cb0bc4f078952531eab53459a6dc36014dc7f226e18f1f0a73338076d06ee0. 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/HKG482110484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d999a1ad39f57a9ee7d353e8fade035661f402120f19176354f2f5ba0c33e2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG482110468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4300916675f53f7c3ad6060421f0987f46cd401f76e707239d36cf8b9e9a9. 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/HKG482010437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d64661621d4986d7459969c4bedadc6fc8da8d07c2a8ca7d44c32bce082c2f7. 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/HKG482010435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04ab3bab86db35540765ee325e610099491ac7837988e6087b4d781f4f1a9c. 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/HKG481910387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e9b5c3295914b608d8a7a07ba22355531b21ad199e751c5d984896bfe21a65. 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/HKG481910410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf9270a303fd2699946e84fe33de440d430262ac48af27712f001256a84485f. 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/HKG481810377.