thumb|A false color composite of global oceanic and terrestrial photoautotroph abundance, from September 2001 to August 2017. Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center and ORBI
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 0x7b6431f95a49aa14a5c034eab4641811b2cd5cb508384f248f487ce263d0e551. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fad4115c-a359-450b-9af2-5a81b3a2ebd7.json and https://artists.proofprofile.net/proofs/artist/fad4115c-a359-450b-9af2-5a81b3a2ebd7.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 0xd1572345b51a34eaef2d378c453f2633bf1ffd37c136b7245bb067a86e390a85. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR1568911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71aef2903d93bd45faf1fb0a8ab47487a3318553bafaa51eb0455ba63cd44fa. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CA5KR1568915.
living the sweet life, but it still tastes bitter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e32d7aa366b76a422a2730bf63f93f622427d7744d1b85eaa4f8ef7646ab469. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR1568916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dd39cbb4230ae29bb51263a917d51eafe73c5a47728d0571579aaaaded6dbd. 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/CA5KR1568918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13854beb59b49cd9749f6db5347a0497226effa64f6746ac923e7f82f378d29. 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/CA5KR1568919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd1db6ebca2e0e1bb8866a122eb58b54c3f4111ef6b7d57e6894e9ee58049dc. 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/CA5KR1568921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69933bd0d14f6c5468af8b887c71c0f48d792caf74b92eb9bfb844aa8f7fbcc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CA5KR1573370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d1fa2157de798df7b2b0e8d4c450155de890772bc6c50694de9e79cdf3a0ab. 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/CA5KR1707063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9b6260cc051068daba46ea663c7c8c30d7cdb68f40f7a5d0387038f1dd04ce. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZB4J1896366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c732955db07e61ff63d6c98ab834b60c4f33686c3650b8c63ce04f2e00a793c. 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/QZB4J1896379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1caf75f45b71b0cc0f9c698c3ff98dd0311977dd307c19f1a416ff6c75186a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZ4JJ1979544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b275354574b4fbaf9af13dde391ce4439acc9275135044700c1a1fdb3efbe41. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZ4JJ1979547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f65a549a6fc47827555138ab750a2b11da01bda6a451c4d0627fea7606adfc. 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/QZ4JJ1979548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf03fcb23676e8c025cafe92281d675f4b7b44e8ccf36963510737000987fb35. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ4JJ1979553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb96c6bca594d6b37fba603f0563a104c3849f58477c079e66b5ffaaabdeb63. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ4JJ1979554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb702072db774a8654850c53bb34f3beae4013e7f24536de2a4b6fc9a911ed6c7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ71944361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8217def5ef902208b16f76d6f395cbeed9ed7ca6aacf2e5a9703c0eec201a097. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES72012626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bc766a91226709902f927e6bfc73d5b55f7cbc3af0393ab8e2930a9c2a9ec8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZES72012627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37819a0efe66bdccc2db3a43a9b1efb47d8d1baf303057be2213b18758908107. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QM3DF2145846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0612284a19fef2fa0f7695edf6926a2aee9ce48deac6f5be22dcd7dcc9a29434. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/CA5KR2358593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329f9f888cf81cdcbd08c4f54d37910cea26393f4a4af78558dcbb32bbb73d98. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CA5KR2500908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75232ebdcc0e48f01a25dfdfb64fc35f47a43a74c71e5994bfac75e60e76550. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CA5KR2500909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638c34a0511e10fed1e6e7e597bd43c978588a284d5541970704ef9f70ed8ad2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZA742423676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeae82ca66fc379e2d752d45bb71ce93e4ed21005106883a00b564c386bbbfe. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CA5KR2500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b78e467371487e2bc7b7cc6af79acf89dbafca59c65ab58af7382f2d1d78e20. 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/CA5KR2500911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b589243588e5c38bd039774471ece43a033b56327c63369a2b93ad21ce9f07. 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/QZAPG1763026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5436d8bc8cd5e29de4b303d944715b131c7ac0d35dead2bf88a8413863365218. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR1576758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98e900a4d882e794f84283efc8bc8d07629a6ba5fb448e1c38d6b5baa45c26e. 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/QZFYX1945739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47277ce2000236f3ffc21e83427f63d39ab9a35952a2b60842d8146be9f7ebd8. 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/US3DF2244566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00c138244e00b66a7f9e808002df045e2678fd13bc4fc9670c59e3d59c9a75d. 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/QM42K1970800.