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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 0x46ad82ae4dbf1240e509ccb9e53c098013897ee0ea027ceceb5a024a81ea0251. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02a0f4c7-c481-46ed-a1ac-d7b0d4a6642c.json and https://artists.proofprofile.net/proofs/artist/02a0f4c7-c481-46ed-a1ac-d7b0d4a6642c.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 0x903abaff99a3fdcb8260227d0b7af0e1fca6f3b6a4dc26df2c18f32acc8d3c54. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GRPA11900429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903abaff99a3fdcb8260227d0b7af0e1fca6f3b6a4dc26df2c18f32acc8d3c54. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:55:25Z), 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/GRPA11900429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc685e756d4ccced2c23bebc29690b6c017367def6a974f4c1e316c5b22ac0203. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GRPA11900509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94c2b1e01b84c83fd3f3e1db17c73654a9933d6ab9c50c8346d2157d250e710. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRPA12100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ee1d6a42af613e0b08f58bfcfc15c9ef5618e42235f559dc4aebbbde29e475. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GRPA12100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ee1d6a42af613e0b08f58bfcfc15c9ef5618e42235f559dc4aebbbde29e475. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GRPA12100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604dfa06b65c22d352898a0eb6c0aabed175f4d7a17a3bbcd0c1b58e1cf5adbb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:46:56Z), 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/GRPA12200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604dfa06b65c22d352898a0eb6c0aabed175f4d7a17a3bbcd0c1b58e1cf5adbb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GRPA12200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd9fd5f9cb7ee1b685dbc6a82df4e235c33cf54ea410ded6419f4890f16408c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GRPA12200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd9fd5f9cb7ee1b685dbc6a82df4e235c33cf54ea410ded6419f4890f16408c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:53Z), 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/GRPA12200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0985168da125a3a0bd281a6f2b6896f6282733b1265ba6fd089a344c14d2a869. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:50Z), 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/GRPA12300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0985168da125a3a0bd281a6f2b6896f6282733b1265ba6fd089a344c14d2a869. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GRPA12300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bffaf350eb640ea11e918ec69f99b6a936bfe5359ff194ff80fa0cb4ebacf76. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GRPA12300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bffaf350eb640ea11e918ec69f99b6a936bfe5359ff194ff80fa0cb4ebacf76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GRPA12300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1714fe4352801d2ef045076aa36061f402fa046a1a3892f961347f6fcdc43d7b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GRPA12300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1714fe4352801d2ef045076aa36061f402fa046a1a3892f961347f6fcdc43d7b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GRPA12300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd63b6ce7b98de934d1d33ff8dcfef5bdf343787e618034df81afc8b435e224. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GRPA12300661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd63b6ce7b98de934d1d33ff8dcfef5bdf343787e618034df81afc8b435e224. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:34:39Z), 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/GRPA12300661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9521ec8e3210b57fcda3efd2020959c1d25d2bb2da3eff372004f2322f5d73ce. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:46Z), 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/GRPA12300662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d98b4bf840f09a39078842532047c7546d34a3213cebe1dc74084b8dfcd21c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZLL92565452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aef98dbd848058eb6698dbd5d052d68a9b706361228df8865b90c394e60129. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEV2529433.