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 0x5d2bd82e9d8b6a1a3367d1df35af570494e4de23928304d17bfd96981e5f0ef6. 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/11312943-e97d-4aab-8da6-6335d9bc7a0b.json and https://artists.proofprofile.net/proofs/artist/11312943-e97d-4aab-8da6-6335d9bc7a0b.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 0xb8573c59111a71e05d7eac622f0ea5f4a782e7dda5da563fe7c1f1c19d090ef4. 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/ESA011661841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f50ba48b6edef3d2f57e61ae5becea64dd7371c91878f2fd5aa8654c9310c7. 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/ESA011661842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bae55e2e0c52fd6165aeabeda772e70065227e40f6201ff8adbf0f3b54d1ad. 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/ESA011661844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde56fb3a7c11cea40682e0632c3c2ce57ef01cecf17c7ff539499229861d09. 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/ESA011661845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbc21bda7146a0aec8b548862f15fe3a0b586b6ee727eb7118bf9367041260c. 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/ESA011661846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500087e515339a2ee6107016c17e8bcf691d39131995c3e1d90cfcb7830185af. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/ESA011661847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715420a5ece08778d6d6a2787c7a02a8a0c12f559e3618b235823af41a289989. 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/ESA011661848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde0508ba3c50e84ecdc6e139822a8f8e0c133f4b640d1f9a5e9b7284d6fc26. 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/ESA011661849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8265374c2513aac565b4918b7e8d9e500b25a22e1dccd33805a848c301b56b1. 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/ESA011661851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c3cc57f69de5795d461f3f8f35587e5b015ed98b91f1de36d74c452b33338b. 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/ESA011661852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055c5c258f8ad0d3cb2d88911d6d83e77b8ada482c4c536fe4530a8a74b3d70e. 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/ESA011661853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e92e1ef9c43416bfec37f49e3116c75efe17b4cca4a4f88d32472cb984923d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ESA011661837.
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 0xe6f6cde0a90b52d18fb1b0a823b89c48c5371e3650b39af63b10e078f293c89f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ESA011661838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c493fcba01de076eaafae8cedfb38e03b52835b35aecba5d3199b8804f5d04f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ESA011661839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d650cc83837afed8e6507fa550feafcdb91048481de15ba189d9f4acd15413. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ESA011661840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b4e8808e2d2b0c1e47bc9a4fd2874f0fe2e14e3f45ac52f7b51ec7cfc66729. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ESA011661843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68686fa014e326e17bf2a8efd0649b16195ccbc52a172feeac3840c32355e77. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ESA011661850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd37f41f21dc8bb820008136a4ceb13d29f974ff88e46deb5dedf24c7935dc5. 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/UKU932400758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ee3b3a9249f34f588a178cc73dccb0007c78fa64d88b85e6d0a1061826e4a8. 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/UKU932400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecb9474e9f627b1468f293b26a5e8d193c7ad1595067afad01b5772c313c276. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/UKACT2270593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96ba71eec3d70beae07f4fe1e3b0d06debaecc0b8ffac4d40c927ff2044cccc. 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/UKU932231479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d9e457f55020ecbe5d944422c731a4d6370657eaff49257623e051d4fda3d4. 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/UKU932230730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f2f47edcbe053caf6adda048768d1c19b32e6e59d5cc2e4c956bcc5ca3bf3e. 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/UKACT2270807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06900f963810ad70fca13c2537638debed675d2b0c150ad2b2b3a983763469e6. 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/ESA011906541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0215b08307e532431f342ffa37847c5841f5f4984ff3f8c4c249eeafc729544. 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/ESA011906542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a9fa6f211c1e5b1d340a8c3e1b5364f499abe5c3238597d4da9423c3c21f3e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESA011906543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005ff3e55455163d6c771d41f3d74bf92c5585a7aad76263a49136342f56ae3e. 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/ESA011906544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21438afb9e27dcd0ba01dd1f1c347c1aded8766e3674a63a445a809202095f4. 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/ESA011906545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871bc3d41eea4841a40752126d459cbb54ff41731699c2169c342dede9e0a746. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESA011906540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9c306cccf4e3e8adeb741ec0888adc254a6b8f5eea8227a2c1760c7dd8fc21. 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/USDY42468286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97c1a2fe3f66e8076f2375913dc4705a6fe022576f1e8fd663d1e7f61cfe284. 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/ESA012004468.