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 0x0c787ad325c7b6fd2a15b63ac846e1cf10ef45e57997c9aaec72b19fea8aa8fe. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11a9029b-482f-40e1-ae4d-4ecb7ab9a813.json and https://artists.proofprofile.net/proofs/artist/11a9029b-482f-40e1-ae4d-4ecb7ab9a813.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 0x13295c28f76b741965f0981bffcfb3349e7b5952de935a64b973c4d1e3e0e50d. 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/USL4R2350309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab76c3605f1542fb93de7e35addf65a0b8760e7388d3019cfda493d5814350f. 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/USL4R2350310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d748354146b4caad15b08d5d4bd8b391d58f9e1fd65212a2d3ff4674d3f8d75. 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/USL4R2350313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988463a5b651dba8d6d4a21a8a23d1b3b9f63f6a4efed8ed3c16109a857bff3d. 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/USL4R2360954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8437ce2fe09ccde10e0aa7165d0fdddfe257e4bf9216ecf6c235f5b6817bb971. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USL4R2350315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b8bc00eab209c91afab8c0b1bb0faf745cdb0a25f859f225d828cab3225db6. 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/USL4R2350318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe753ced551a8e686a505b7d5ec637a43a0432444b1805cf18c842c5bf1ad81e4. 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/USL4R2350319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ce3038e5fa1484db6f11dfd3b95fa779f243eca48be5de6dba7ff9a30b3152. 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/USL4R2350321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b6c6643810470109cefb2ffdf24310e5afed53f6cfe5cc7f2812df05dab55. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:50Z), 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/USL4R2350308.
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 0x9ee16241925de22bf37343b5cfae41ab97d084c962c3159326d9dd44319e9082. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USL4R2350311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6aab4deead9bcdf68d7493da4bf70457852406333e09091ea10b49aa4b1038. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USL4R2350312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa200bd0f58b7dcd6fa73660d1a46c3fe3bff026e2c2b192aee8736bfaac87114. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USL4R2350316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9e797f84941c633f85427c5d4cb9b10cfa3ffef7a543924cd2657da898cb7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USL4R2350317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cc6bdd42ab3010a5dc7b258a5b21b3cb64b63956b7a609b4c8fcfe4a2c8f52. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USL4R2350320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc624cdcd17c95fb0eb007b9b58f1b345d5bbe8214d9edf62e02c4f4a1330556d. 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/USL4Q2390269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a7bfdf9ce37672531e679d8bca26428f9c53e211ab65f9f187955cefe31c73. 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/USL4Q2390271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295eab6ffa3ee7a9b45a9b16ad6733805ee4b24ce4c09b36f6dc2da4f9ba5148. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USL4Q2390273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d658c917550d68279d47c5f0133fd511dd6d409e05bc03f547a67175f7c0a35. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USL4Q2390274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec64c291b1c409a4ca7ece93c41522a37cf31daad3d53691f153afc4c18dffa. 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/USL4Q2390270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a71028616233e2fe829ca22763091a36590edd39f2df0a2b63bcaed53ea0f. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USL4Q2390272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1378f2997c2297aec92a4168600c99fbd4bf0858621c71fe902c316dd7185620. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q2390275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4c56915bb8be46fdd66cd82e1cd7fd30afa5607c1df88ef6ed0e8e2d20c17e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USL4Q2390276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbf10635219d5c8705f0cce56832ebf39a9465617df4dc1c54f3367ed90f56b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USL4Q2390277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902e51cfedb6e35c74912bd860ce019558e73ffca767c6cb37c925cd3407e8d. 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/USL4Q2390278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a361dd0cfc1ff2181e8d7d0b09cc1708f104cfad4955cc46fe087f3588dc21e. 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/USL4Q2390279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc2cb7dbad5d650c92fd746b9ad5510946485c9ad2fed0e0369144d3ee5469. 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/USL4Q2390280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc093953c1287ccbd013bbb35c0b3072e5a58c9bb6fda64a3fbdd64527286e461. 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/USL4R2304602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fcd46c56970eb42c57742d15faa89128434b930b365b0f151ab94739620509. 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/USL4R2304603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3a01fa86e89655b235a6c7bd2eee2d794eec65369e30ef0632d705243fcc4b. 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/USL4R2304605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb02ed31e368e64c7b4c48f3a26da9fca4e1a4534c3b660cb6020df0aec24f3d. 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/USL4R2304606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe47a91a05b93a84f4db26a9ccd69d791c81feb50de8380b4d5751af7f425cd. 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/USL4R2304607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65161e5d4c6e8a9871d36b230c33ad6bfa63e41a79d0c6cdc305c3681b02e519. 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/USL4R2304608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf83866a4f09ff9686009fe5beef22881e1c23f80b82cdf839128030fbf906c4. 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/USL4R2304609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bad8f9654cb54bfffba926c4ce4706f35661395e0df03462e2efee52df8b81d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USL4R2304610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9589b5ff3d1c0133434c7d1ce46fb0c397dd74c380eed43827ea3b27806ce9. 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/USL4R2304612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d31923eb66b766362fbe0a5062d8dcad21662c090d3bfef454da8923dc5c654. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4R2304613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6999d727f562a80dcfb5a051ab22a7c96e09040163231fb974706a63df8610ff. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USL4R2304604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f49b7b079fa1988e3cfa4af929efc8ce7dbff0b1b9eb6ed7210814509b62c3c. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USL4R2304611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf89d5382b88655a939ec43966517eb1ff05c92b8945fd15bbc234d6351a746. 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/USL4R2328388.