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 0xa3ac1b533c35cb3f7df7db51c801ea3afe3658ceb1b5e80030c28cd4eecbf029. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae5bc37c-376a-4ab5-b287-58d0f7d7a357.json and https://artists.proofprofile.net/proofs/artist/ae5bc37c-376a-4ab5-b287-58d0f7d7a357.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 0x7523a79da9b40a20705e14a5c763e029136d71218a8b78be6056bbadd3328c6d. 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/TCAAT1075109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ef0b4b3ae03d3cb2560b50d9d5b2a9afac38cbb7ae42ef7894cc4602c83e79. 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/TCAAT1075110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72b96e77e841b6a6ba7d046b0d9a76eae7f8739c8b2c2662e88d6ba8f6983c6. 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/TCAAT1075112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae83cd3ebbef89250093536bbd1c6a34155135d06beb1bdee918b3f85c623ee. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAAT1075119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84993a470265aaa2e77eec5a561996d8887800918f332bf7e809ebe1c175807a. 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/TCAAT1075124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86fa6eb58d1787d1d72d7c55e2f6043d8ea6de4863a45b6f48e9e9a7e5b4c5d. 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/TCAAT1075127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3175542d2fc45a95ab587e0ee03b39a3308087b7d7c04c21f12ce364e3c0dd8. 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/TCAAT1075131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b678e1fd56bb9f4dc564a89b0bfe018028390c41980e407a98523f3f82734c. 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/TCAAT1075135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a78b44cfbb3c3831ce796ef612de24d13375570b2d9bddd10928be7bae1d40. 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/TCAAT1075138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d02afe9913fb45006a9f890c572679e488ae9faf34ce54fc1f0527ba72c7a4. 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/TCAAT1075141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1116ab9b5a05eac04ff150090e5d224c0eb3a0be8cfecc24c57494187f8be958. 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/TCAAT1075143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39671fe8baba3e37d8a78e457452946fa90a758748fd10c5087cc7d47115f953. 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/TCAAT1075144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27534b4a12bb2dbbd5a11ddf4f0ed8b7a1b3fb10159860010c4d8549c26d319f. 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/TCAAT1075148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0957f0181e3b5da152fc222168f2a03cb4d7c2f8afe7ed5da274eb4c26f218. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCAAT1075149.
V'chulhoin/Bor'chu,Hama'ariv, Oiheiv Amoi Yisro'el, Emes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc49fdefd0c0454b8e993abe83ba28bd41ce2770f69c9fea07e4ead473f0fca. 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/TCAAT1075167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64388a4bdf5678506524063822145ab21585f3f5d646b200f05cc5e3dfc38405. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCAAT1075169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9919cf73c00854ccb1c2b618ee2fd5bce0e47b2b395e1946aa0b9ae4820a671. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCAAT1075171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda93d1957a3cab13374617de8068f3726f5cbfeed29f4175a44d19e8137a3b16. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TCAAT1075173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcaee862dc65db190bf29f85c4ad09c29401c1d30f4aec6f4fec23e9153e4b4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCAAT1075175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee30f894e5d10e697ec4bd3d5ed8b35efe0a413460db7f8f553bf6209b93a1b. 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/TCAAT1075176.