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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a46336c406dde63af1f0bd47fd163e46c4674b9f6ee4457cbd0a3fee249572. 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/467c5842-2f0a-460a-87c3-333d8b80dc66.json and https://artists.proofprofile.net/proofs/artist/467c5842-2f0a-460a-87c3-333d8b80dc66.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baea962091b0538dcb9d51902acc2a7a5dc39803beaf2d2b1ec7fc424f1ab3d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUMEV2579674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e176cec76c3b880a4c90e0fe87c2d1dbc49b003f9c789a4617957a26972d990. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AUMEV2579680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a69efd2759389576b856af24b5627800441462ae8581463775817f1d2b7b81. 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/AUMEV2579681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aff5916eb03c1b0232498ce6fe4a1d6c2f05a06c8754d10fc08f469d0acbdac. 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/AUMEV2579682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea59be8ee5d339874af5eb34641098d9ca1ebe0c3d1a72c636ef37fa0ecae09. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/AUMEV2579684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0359fecf2c188c082c3747920478c315a860a60eeccef3b8ce38653e66172ac1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AUMEV2579691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698911487dd3759e8b5abd5c6a180c15afc262c32b3c4279f93f8c8017ff7260. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUMEV2579693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e90a6d57f0fe8976c94e11b6d266a09fcc36c8308b720a3c46d06b3107f4ac. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/AUMEV2579695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92528ed6a64366f5f27dd9f27137a8c3c8cef98d1b2e3cdfcf4be944791fddbb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AUMEV2579697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94123d703171bd119f6de4939368bb8b6c9f8e1874995bbc62d3148ab0e3536a. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/AUMEV2579698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e8b1722ea5b45743fdbaed49d2f8224ce3808e9cf45b4ff659cb8febe5206f. 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/AUMEV2579700.
The Rising Fighting Spirit (From "Naruto")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356fb7ad3d0eb92fd24b1ccd6f3cfca4390359f4d2ccc0492d42a0e77bccd123. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUMEV2582524.