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 0x93b6be0c8d6bc4724e3b877cb1411ca149506f85a827a983e2fd62731c271591. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/308144b8-4f10-4374-bab5-ac812b2f0be9.json and https://artists.proofprofile.net/proofs/artist/308144b8-4f10-4374-bab5-ac812b2f0be9.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 0x1d08d84c6f9aed09e3f2ef5b200816165075a4d3f49c3020e150a76ddd58dd2e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLA270600804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bcfa3b6a8434e72d4836a057346ae31338afba9f02de2d52889ffd4d8321a0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLA270600805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b7185e064525c491a82cc0ef6d4e02946a774f399af6ef389cb148ab1328c4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLA270600807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f0482f529a01488ec6c790bfe05a2305b27e2aa0aae7cadcd0fcd734b67cc7. 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/NLA270600808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058d6b58099e8d5a932d909b5bdbed486d1ac837bce228f0c38d09c2b5200552. 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/NLA270600817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a22d20699b05303c65c3488761100130b5387ecee79f25185e5603873f6e71c. 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/NLA270900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94e07562b550f74b8ee4e9fd99a4e1240d571c31dd008d2451d383bb1d44e11. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLA270900085.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade37b3b86e484f0e31ab3e51400077ca00f5109c0d1edde0bfd77d62709f6f1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLUM71700383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad811a8c9fdf7e3570734ead14c447d19fba9bd4242bc92d38082b017604a52. 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/NLA270900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b57394b81b40db25d08aea92a5637f469ada6fd335766761d80e8faf2fd943. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLA270900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9daddf71b5e1722435662dca76730adf7c3f6e8385e7db3e026f45abfe4208. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/NLA270100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfd6f27c1212be9f6de8c4375afbacf440089d59593b461156ac3fe643f8d42. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA270800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ce0bbaf93f321bf7b07d42133d9e979d53b032c0a18edd5d1b974a00345a03. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLA270100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0331a77ab3aa7b10ed5e309c46e8d8e5ff4fc43d3c7d71af064efe525bf6c175. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLA270600821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaffa2c144c73a52ecbc2f37f098679fbd41934594560222b5bd9399ce6c165. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLA278100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b77b7f29502e59ec4e354c819be20f2931ab6c0235749ed2e9ad0521467a9df. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:57:48Z), 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/NLA270900380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe72959dc998f9454a67fd5967f9c03304f3226d7e54cbb0b5fcfa75370de3c. 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/NLA270600830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9794b63118452e5dd60bb68730982c697e316111570e33a73151db495534a4. 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/NLA270900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf67483fa10ed8574a6baf1ff551989d0e926390984abc08a08e948b4464dcd5. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:17:03Z), 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/NLA270100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78be51a19bcf9e542aac30fdc5f6b72f18dd202f1ac202ed7424666ff8a9a2d. 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/NLA270100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3e816ad3696a0e3775c9325dbd42b73a800780ae531ca046783528b854cf0c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NLA270100218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ace6860c7ed865165436438772491bd14edcf11e198f1fe38a227174931e1f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:43Z), 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/NLA270100217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8ba84517651bcf60b89f7c074cbd2a8e92e4c345dc5c678168581ad1d3c636. 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/NLA270100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2929279daa90efb7662053b164a0f3777bf827976d2e456234b6feeaf1e404c8. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NLA270100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23422f4fe03e83baa705e36bf9a52183f15c4134958b80f795ab0949caf6d8d4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:51Z), 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/NLA270100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b8ea6ca694e0224b759bd7b315b55ff12592c39814202857155f35ada512fd. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NLA270100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc17897f4f270e70977c63d745aa8f888667b4ad8149938d4608ceb51bcb8209. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLA270600826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ce0bbaf93f321bf7b07d42133d9e979d53b032c0a18edd5d1b974a00345a03. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLA270100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc152ff39189a0ab1cb6ae190d00d1986f3682c804b4a09b12fccb6d23d1887c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/NLG620441918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5312adeb99bfe0bc0c16a9ab69f65ef4cff631ddb4c0eb186cba08c82a374724. 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/NLG620441922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7164b1a2f797ed3bb5228faab1182d845fb191401300ebd96a2bbc6296a54793. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLUM71700923.