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 0x7d4a992b23dc20b33275f56fb473340676526af589f7e9e6da5d3bb8e7e9ccce. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70228981-17a6-4429-92f0-d5470a399499.json and https://artists.proofprofile.net/proofs/artist/70228981-17a6-4429-92f0-d5470a399499.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 0xac5e10c19c64064e4bdeb2fb7b0f03c44f2831ab3ae7a68f51214eb825d634ec. 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/ITD541100745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487c38fde17d6c6c3f08321dc2a4ab0fa6c1bd32dde00018529db2f8016cdd96. 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/ITD541100746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867a8837fe462c24eb7ce4b7c5aa2680531c09a6aa3974f65b18553d87e1b2d6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITD541100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53834cccb2e07b6863768642b359318b61fecf34a809efd1a9d7bf159dabf1b9. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/ITD541100751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a064b8a412b6d00cb11bac933549531208f00c72d71a88aa4223ed9406855a7. 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/ITD541100752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e035b655d7b8fb41a83707ad99c9faf1b75863afae478d3fd9a80d271c3263b. 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/ITD541100753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b6646d412734a1f240775de8b99054b218cd0fa7f54ac7561038dd9dd2e59d. 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/ITD541100754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa23ebd4e5e9fafd8de0ea92d489eecd9e5c1635e7463b354ce20c3c8f4381fd. 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/ITD541100755.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487c38fde17d6c6c3f08321dc2a4ab0fa6c1bd32dde00018529db2f8016cdd96. 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/ITD541100746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e10c19c64064e4bdeb2fb7b0f03c44f2831ab3ae7a68f51214eb825d634ec. 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/ITD541100745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c995b2cbd0ec65ad0e58822881bf037686c5d01ac59497712bf18010797266. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FR6V82328354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867a8837fe462c24eb7ce4b7c5aa2680531c09a6aa3974f65b18553d87e1b2d6. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/ITD541100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53834cccb2e07b6863768642b359318b61fecf34a809efd1a9d7bf159dabf1b9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITD541100751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eb341fff7e220973a3d947a364281f690647b4fe6763783a783465de8be55e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR6V82328355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44254415a9c818b3f4b95805fde4d02da38882009a2f3e35b48b21bc5f7f2359. 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/ITD540800404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac6f06eb504a3661ca7c571db1661480cdadde29c44a6a785d6d95146b005ea. 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/ITD540900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439f46951fea1d10886bb1cbcff036df980b81742a55a598625138321d517233. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ITD540900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e035b655d7b8fb41a83707ad99c9faf1b75863afae478d3fd9a80d271c3263b. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ITD541100753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa23ebd4e5e9fafd8de0ea92d489eecd9e5c1635e7463b354ce20c3c8f4381fd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITD541100755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439f46951fea1d10886bb1cbcff036df980b81742a55a598625138321d517233. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ITD540900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714c4a92d7f854f3ad101a7a18d50ea3d94dcca5be77ebe20946c1638b5efd5a. 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/ITD540900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb24f1ea29a2c7e0e21622ba58ebb0fd072af225da8af93923aa4ab60b04568c. 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/ITD540900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d619a0604d5cea86d60994fcaa826da8278f2358ca6e39a4469426e2af3a76. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITD540900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac6f06eb504a3661ca7c571db1661480cdadde29c44a6a785d6d95146b005ea. 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/ITD540900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f1af68aeabe226859195d13fb07717646c61d9dd9eb82eefde0a65be06a9ac. 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/ITD540900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9612493d40336d2e228f5c6c012f0b2050a7efeb3ef213c4674ba2f9f26928f7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ITD540900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0805fe423fd09c67f93935fd6e77fe07376f9e6d7c3dc5a989b8db3a4c48417d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FR6V81038610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f39817af9730e42bb01313c4a00d46845fce552b87919722d4b4c1afbfdcfc. 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/ITD540400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7728b7bc6646bcf27c17da132f73c8082a67ee6bfcb39e6a86784c60834b79. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ITD540900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dfe58da0150ed0ab6524537433b1ddaf59886f68576c107a98faf72aca287e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR6V81038613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f60e62dd88cfa6f252ed4c43d0f3f80983ae58c5016fb886943e9f36a1d7bc7. 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/ITD541000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe978e0247a0c44668a773e4760703e97b29fa18244fc9c94d7f4cf84ea082fc4. 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/ITD541100738.