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 0x80987f62465534ff8ab660dd21151ef683f203bd156345f104d6f464f0948774. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/857d5fb2-87c6-445a-a656-049b12a0efe6.json and https://artists.proofprofile.net/proofs/artist/857d5fb2-87c6-445a-a656-049b12a0efe6.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 0x5d98c573b40e87bb644cc2d3a26d8383d49fe839cef74771404934787e74bf23. 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/TCABE1223950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd9b095f0a5798fb592885161e10acd05dfc84e52894583335f530d65f7af93. 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/TCABE1223954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae71bec2f85bbf65fc8ef2bacd14d4510c3ffb447d16a9941357394f931168ac. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCABE1223959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc018fca82bb4d433bda860f65b368337c18b7a8340032eeb963fdfb3f2ad9ec2. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCABE1223960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aba40b750f15d94d14867a19ff0acd93a3fd9acaf66c6b94e7c5ac1153a0600. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:57Z), 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/TCABE1223967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef5fe420654b8e444f65a041940aba221853054ec40d7dac2cff59a33f9a3d1. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCACR1637710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096549de5e44190acc01fb7ae2a3e59917dabac7e5a63ce02ebb5265b6228191. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCACR1637711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cd5fef82e56b0d58fb82706ef76dfba59098178f807068f4183534c2a6f873. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:41Z), 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/TCACZ1735826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5beb1d1e5efc414cc7abf6349b478cba287547e22d56bba642b8a96663df63. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:43:41Z), 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/TCACZ1735827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dac87bce54558db3bfe89067aa89326a3c94457ded3dc474e9f5a6bcf6e950. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:26:47Z), 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/QZHN31943186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1490d52cc8fdb946134802b9345297bca32a4f9bee9c6be0a6e16191827ae394. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/QZHN31943187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a578f3a09591c039fa4ff7255ed057bd37c86e55e4a1ba3a64791c24f7a6e6c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHN31943188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9767a2507862283327ea4d32348eb6a419885e0385bac2fff5194269a6bee2db. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:56:46Z), 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/QZHN31943189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e34f8269c35f27c598cb22a355db08359fc471252bdce9208befd36a18fd3c0. 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/QZHN31915268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631139c5c220f31657af96d9edf64578cb429b5b47cfcb0bf66938cdf92e151b. 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/QZK6L2037670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2794cc0a081b77bdfc439958d079cbb696aba488670c91f81d7a9ed76a684e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6L2037671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd09b4143805509ddbee8f9394def878b2ef0c71869153cbbd2fd742a619326. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:00:23Z), 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/QZK6L2037672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650e4be44fbf3975434845a36c3ad53bf20c64cd73beacff2a640541941eb2cf. 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/QZDA72096547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd61840bf5ae41313177ee4b3b99b032af1bd4c0b0f10443a5d03c3fbe4affce. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMHW2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe172958087406e86abb8c7fe741bae34326ef882541b9873d99670bc2fd58c59. 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/QZMHW2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa832da19b54918a7ff9f4a88468a6ab884745b893afcb4a54e42f9fef146eb9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMHW2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfb034160230903303a3232ad2411dde071e6e56830b25c85ecf860f647dd1e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZES92104496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86961c51534c9a06397245857d0a84333776013e73b2234b54273caf5f34722a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES92107227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d5cdc18339f48b94adce27b70baa7eeab515828e24b7bf64325a63633a1223. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6M2248307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9529edf2d8d2aaeeea142a011310f8a5f414deed8708470d9cbc29425abc5387. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:00:40Z), 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/TCAGZ2384048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c836f0b8a1546fad0620b2506e02f471a6946ad814daf28572ad2504645cd51. 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/TCAGZ2384075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4619c1f8751b930be7aadce490e004d942f9f7894d59f8c1f2c0bff553e8c3b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAHD2317383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef68245ac82b0e9c3cb6015588004df95bec25fdf95a025318cd713352a69eb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAHD2392673.