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 0x686f47c20a787f8c57b57748f4bd52855989fdeb1429783deadf5e7ba108399d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d58f247e-c020-4d09-a288-6012073732e7.json and https://artists.proofprofile.net/proofs/artist/d58f247e-c020-4d09-a288-6012073732e7.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 0xc980571fd6124c18e552f9f27b9a21dc8866295d2d59c41e8eb4212e61c57a7b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOX9X3461601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b049baf190d7ea0605f58f9a3e57f1f44319660948cb8ccf9bcbe200a169169. 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/NOX9X3461401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f47caaff46877be3b8c66c6649d5442beab024e0f68f3ad7d2193ec01308ad. 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/NOX9X3461402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a168b90887e78bb29e026c17e5917ff9b0836d7bea832720adda9a662fb29f5. 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/NOX9X3461603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbbcb358d6682f730e555512a326ad8402356af0a4dff0f398678facec4fbbd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOX9X3461403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4338a9b48c0d4d5d1d30944795d22c4fd0c27b1109a8ca3a3e6715dcf8f5ae70. 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/NOX9X3461404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1313bfa0e49e483d96101a026c36a76ee2d4f986cd7b62dd42b8e2b3855cd08e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOX9X3461406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98364c35d731cad6ed2646ec49bde7d55284fea0f9b1d089e747167c0d17a09a. 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/NOX9X3461407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0001127abe73e3a6f48931e71ad5f0656f2e1aa8cf6652086a97f4bd45736e42. 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/NOX9X3461608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5568000371790704ffca51bf107239667b68ff3f6fc312a267f4af20d5aa4c4d. 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/NOX9X3461408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe066248a44af018157d79517b3216bebce73d3163a5f0260c4b77125991682f6. 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/NOX9X3461609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39606558aa3cbcbff5e1ecce990df2fc68247dd7287eca2ff0dfe355043527e9. 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/NOX9X3461409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c7ac92b63651434012e444764bb071ad79a0ec08811128b03f20ed172464ca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOX9X3461410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97ed06de42a886e49a54e6fb522b33a84580cdb3c2c2ef51e4d7012e5315b3b. 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/NOX9X3461611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96070fc764475e6504e099126b71959067f4626472700f8ae9c7e21ae3c1d65d. 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/NOX9X3461612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd99d8968df3a501628cf3d9c8aa2529c132e0b9b72c371679c023d708d29bce. 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/NOX9X3461613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e227c29d30fafef5392c936f504453f30ecdd5323fc142e28b0d4b462513c04. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOX9X3461413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdafedf6fc23362d1bd69aa0e6baa63c5bcfd5f0f225a13a6c704081ff5e23b9. 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/NOX9X3461616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bf35bbc56a1daadc17744c20f43a3b688a0f51ea0d5d0fdf5db34b01d42c01. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOX9X3461417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d979362e1bcfd2e36590f333d4078f7073b8ca891868beae42a7d293b7eee. 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/NOX9X3461418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe961675e14228106a2f42644c652f5f00b118ab0c6d0709dd6b744477ff8cfb0. 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/NOX9X3461618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243f19a0318a0794ce14c75383fdf43fca0dc817d8655a8bf92593c41762479b. 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/NOX9X3461619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f66a72121cfbf67f22eac054437156caf489a03366441f4c57c64d8e723f76. 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/NOX9X3461420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92db9e33e75f27dfb8029771f29b9d8c218e516afe680acd0ece9fcb8de9572. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOX9X3461421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90874b4868a391b93bc5e04e4496ee1527a8a073c13703ab9709e38fcabaf68f. 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/NOX9X3461422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e5a8532503bcd9961640688828fdc2924bc1b0422b4c71c7156e589711765. 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/NOX9X3461624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cbb38a9c13fd01d605a9b607c018d3e8b44c7b83adde14cfc8f90cf1504f6c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NOX9X3461623.
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 0x04793a24f84ea901150355cb8084e834313eeadabfae60053b0b68d1ed410e9b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOUM70500690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8f7476dfdb352910c57e72edb9799467f7f0376568c891ff2e9f86bd1d679d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOUM70500691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515902d9af620568c825b3b7621b7dfd6629265c55d9a913d6750b84e5741986. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NOUM70500692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f14f8a8321ff2fd9016745cc2d64437b9d511b59a4be638434725368cf090d. 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/NOUM70500693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f93bcb6ad389d474bb98245942450ac78c256ad26ffc0fb179ba4a50b5a5ec4. 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/NOUM70500695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90de4c06bfa45b34a42e82fb3fbbe8773182b5a2548b70e6e32b16c9bdb38204. 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/NOUM70500697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bf35c5bfe5ca1d35391734ed157bee2cde1a799f949ac5bdb02d20feb0a7ba. 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/NOUM70500699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bce659bc5db28d659b3c2c1ddc0201bde3ea42c7a11f0e7d62b55030542356e. 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/NOUM70500700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652ae846d86ba27da7c474ec98e540cb45c019ac094bf84fd1618cc65652c25d. 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/NOBWW2103010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6f3b7d3f13dd3e3c25fdda5da535c1586ad81f2801a6c62d3ac3430cb42996. 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/NOBWW2202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d6d87f2d394a945bc2279efaa773a9da8dc95a4147973f231bb43109cb4698. 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/NOBWW2202020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571a0ec2ad46edea1cce0d7f959c9eb312853b7ae34a9b88531e85e86dd86038. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/NOBWW2202030.