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 0x952ab269971568914fd69a7d5c3a136e617d87576ca8a3660eaa4915fb8f07c3. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0679a13b-a734-41bf-a85d-6b7125d769da.json and https://artists.proofprofile.net/proofs/artist/0679a13b-a734-41bf-a85d-6b7125d769da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x9d8e5c252241c1b91d03ee34196bd5cfbf40f0e36daf2dfe2b6c9fa24e5771c5. 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/JPE302200698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597aa93edaf1a64fe80a7c7c08a00cc0f271fe5c026a7ac210a10190c8d32a5b. 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/JPE302200699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb56879e1280844b729f92d421c81685ba943861042ee5730c3e8d22838655. 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/JPE302200700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd273e57c06f8f4214e41de12feccc638c3cb3185e70e1b30991f9f0d768780b. 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/JPE302200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9243c3153083e57d0ac8b690412f872c90cfd1203ec00f651be435f0552584. 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/JPE302200889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04c48c56e730e2c99a81dd1ce7409264f5a132896012b8ace58ea7a7b582978. 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/JPE302200892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6fda8ce677e430e4f5eebc0f5add4063b1c0bd42949fcecf28503668c4e066. 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/JPE302200893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dcb1baa49b0a9a504460acaed3c8271e769f3009629d61be553eb2a04d0adc. 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/JPE302200894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf9deac6206314928c061d7eb389a0c6f3899e818e3ef8a18e946d4aa12de9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPE302200898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85279a90f2d9baf407e879dc7e6066628fc7d287e79eaef5e515a24827d19fad. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/JPE302200899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0239accaff443f490ecc14a1bf013f3a77b898ad301397894d29892cd38ccdd. 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/JPE302200902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e02a4ead31ba6887922c9572b96224cc5f8207fad9aa08244074f1ee2a95507. 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/JPE302200904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8666111bab8413d0f9b0d186e53e0f285410d0477081038d8ece158ad9afbda4. 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/JPE302200905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ebbe4411c1964ff25cc3d87970c231dd7904ef356799cbbb198445854c81ce. 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/JPE302200906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309c26862faccfc511a9070ac25130d14ae59d535ad4530843dab6785d1d05d1. 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/JPE302200909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe26428a137f91266c9b1d237a2172cafd9dfaf4f1d34df33955f2356e2a5622. 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/JPE302201035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b0c492ae2312367dc73975c5eaa9a75c49f15c10bf5e875381e3805e41ff51. 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/JPE302201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921b593d462917dfe01d71bb4498a1525a7a37b94fcec0b72a3ab463d2bbe2ca. 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/JPE302201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f1b12265da2851947a1aad3742f8556653191e9e73bc9b83d1b147ca88bab. 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/JPE302201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9e898a24bef717774e6ef8ef151d7fd831b45a0b79e3ea7ed1c8536099641a. 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/JPE302201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77198a19f2ccee4559c42016582cf8e370d2a2a2080b9b20b45f1dd07b55507b. 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/JPE302201046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d3ae92c6d63375dab87dcb990458874b5eba0d57376d62b1a2d6e282f6b87e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPE302201053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f10ba555c8aa25ce43d37bc4f7de7f540037a18a4b9fbe402b0fc2b7527684f. 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/JPE302201057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb899a3085ffbc9b3a5a1beeeb35f6e4799ef3d1b7ceb8e080a0d5f04045acd33. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/JPE302200702.
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