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 0x6cc7832c3e199a2ccb4b0552f60c73e47789c5c4fcb443d7d70f073b75df6a04. 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/05bed3c6-cdbc-4083-a4b0-051fd0339e17.json and https://artists.proofprofile.net/proofs/artist/05bed3c6-cdbc-4083-a4b0-051fd0339e17.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 0x360f1f7652375ba733e6e012cc79141f9701acb382f5e72841576baa373d0a3d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DGA082330920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb715808ae67f1055c13e10fb5c603da0423d05af24809bfcb483288bab5e2763. 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/DGA082330921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0952960c07481fa6f92999c9ee09339af49463abfca8f61c7ff305381b4c9810. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA082330922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea441c71be7b42e7ab21d227da0c6fae4768624a7d1c2f4bfb5d3f072869b292. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DGA082330923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1b5ed2095fa187a9b29cb4d11afe486b9483d4b37935e071e609a38d230652. 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/DGA082330924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567a0e47685e74063f5b34b02cf0bcb5ecd1c66af4b6e59db1f324b24c562836. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/DGA082330925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e97b156011e38e5d2abe62aee0f6f7f5f4ce2c514bf5da4a27b530351889847. 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/DGA082330926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67fb4a5cf300982da29ee6dda9c04ca3cc5753e70d4d26ce3d94920d67506ec. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DGA082330927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876b66804e318c12aacd43646ffdae4a8b1cb91f0af3ea68b4fcc9523003ef04. 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/DGA082330928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed5cec5ed6b7354c328d96f465c628e27d7b7dee6803b52eac46e3a21ccf4ba. 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/DGA082330929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9366b562a3308c64d550ba525271b2275705b99f0da817899ed7b5bd6c7b42e. 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/DGA082330930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e7ac3ecd1294a09b959f605d23d74d386228e8962192683cf328fe4ec2e2e2. 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/FR2X41746840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead749731ea3d1fcd9b7732977a87ad86410ce59fdceb6141021de114da6990d. 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/FR2X41746841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8aa7b824a898939351209e031bbff620f1a4efa8f57104036eaf084834fff2. 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/FR2X41746842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca234b77b92ad41acc09a65b2044fe4c57687c99ab6c3cce71516164d171f118. 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/FR2X41746843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc952fe798661a61ec81255ca627ef469524682fa18ad7d19c82c927ee631527a. 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/FR2X41746844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acd651a2ca73b94df7e959859beac3437550b52ca2e9314613e02db9aed8af9. 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/FR2X41746845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b705846c07956a797b154dd2a4752020021703bfc5f64165355aecc1d34811. 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/FR2X41746846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b35a1c3cf9f671c56a3a7deda2e898ea53779e51459380624a656eaae41f0d2. 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/FR2X41746847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90fe11a49bede1746b59b55ad15c9db61f2a7aa6ce6e02212094566db00240f. 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/FR2X41746848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa45682942e9ae8ab5cf43513ea2075c3fcfd807c5b5c8cfb1e4970f973dcc4d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR2X41746849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9366b562a3308c64d550ba525271b2275705b99f0da817899ed7b5bd6c7b42e. 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/DGA082330930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876b66804e318c12aacd43646ffdae4a8b1cb91f0af3ea68b4fcc9523003ef04. 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/DGA082330928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876b66804e318c12aacd43646ffdae4a8b1cb91f0af3ea68b4fcc9523003ef04. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA082330928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec76440803c4884b5b5db4e09f7ea18274c2051c23164a02cc775f7e4e9895f8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DGA082330919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb786f5b650bed89b13642b7e2544cf98051b81c97ae8235ffe177fbea8c347. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR10S1768535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc29a428d5f020632e4d47a0dec634c12162e74dd9f81c03aab2e62373448b6. 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/FR59R1615937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f357928bd203aaffa322c5196321a0f6ed82f683bf4ed7c301a376e846fb47. 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/FR2X41600031.