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 0x215e5cb98ce6eeca84d5b577c363afbba3bd649db14380b70963d336dc82a68f. 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/a4084f5d-9f7e-472c-ab3d-75d6b6d6d422.json and https://artists.proofprofile.net/proofs/artist/a4084f5d-9f7e-472c-ab3d-75d6b6d6d422.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 0xe9160f37946db81016bfd5f0be74626181b2de6920c0ecfaf0a05278fe72b0df. 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/GBUM70811880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b05133db729189f95875ed0483f2e0401d1eb07f6afd21fe66a41d8c467f63. 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/GBDCG0200358.
sad beautiful songs by The Circle Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143f5c3679274915675c7baa6684620ae3a83cbd791e84ed47ebb974ecc1e534. 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/USUG12301750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b723c122b6749773ec430bbe66726a67f1cd53e12b4f8240292afd01f9cb0f. 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/QZJ842000799.
ethereal romantasy by The Circle Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422f0a28d9f2084ebd9ca6c3d67be6aadd23867bfed8f1b5d7cfa3627f5396d0. 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/USUM70976692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bf041e65f46af3087764260306fb2ac2362fb32e6ed15e886fb44c0b4c37f3. 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/GBUM71903147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3faa08cd26d4c88e79ac88efcb665effb65dd1c223fd2428460d312cc50dd1. 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/GBUM71903648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299cc20dcf5ef5ac25958d7d03e845a22d387f4e508aa872325979a1edb2351d. 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/GBUM71502979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898397d9809fdb43a819ff83735106cfdca096699e57cb55adc448e698bd05c7. 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/DGA0S2411286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc53ddd94cd66058ef551d3acdfaf9e087c8f187dde7c3edd2223cd8b601652c. 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/DGA0S2411287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53177f181ea6069493d138a97ea13c3bc9500bb6ae3c2eb8dfd5bd8d63566b4. 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/DGA0S2411288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f465ff6c82cbefed33d682fcc5c43e195e1d514c1b1d2512fb1139b083f0ff3. 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/DGA0S2411289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d3d6c7e3b0dd7361865291b9c59a0aa2718feeba2556d012d1ac4963bfd908. 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/DGA0M2432788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd48b5b6032fda6e1ecd761f491ae77a68dde690435d3b8f1d9ec73f1f9ccea2. 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/DGA0S2411290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa512f2a867ec587dcc5620fae928d79d739a2fc365eafb5303fc01530fe9e2d1. 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/DGA0Q2493305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5d8af39653866575b9c2d75cb166386b5675fff231e9e854045d3b12262465. 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/DGA0S2411291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5de5275ed4bbe8ee255fd6aed83bf75f9d1badf0461db04cefbe62fbb4fdb4. 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/DGA0S2411292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa512f2a867ec587dcc5620fae928d79d739a2fc365eafb5303fc01530fe9e2d1. 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/DGA0Q2493305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d3d6c7e3b0dd7361865291b9c59a0aa2718feeba2556d012d1ac4963bfd908. 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/DGA0M2432788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa512f2a867ec587dcc5620fae928d79d739a2fc365eafb5303fc01530fe9e2d1. 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/DGA0Q2493305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0497d2c9da76c45e2b791c52852a358c791fb343d015ce7dc5b2cfeae55fce. 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/GB2DY1600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc906a81b1fe535f503197161ec3bd412776ac757a1ad13050f38b82d8c9051a5. 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/QMEZE2076989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edef71084955737860eed22d661909bcd00907eb9283001f14ec5d999e3b3ed. 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/GBUM71402899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e7005c7c2f3eaa5e0ae73924fc842a228bbaac34379ff83e71dad1cc5682cb. 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/ATCF61910002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e856c20d85e97d2c1329c9f7632347b12224936d38ae19114d5dc8efd1ea6a. 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/USUM72001714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62e7379e2fbdbdaa47aed994775084ea92019db90c48595af8aedb45e5d39c6. 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/USUM71015280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f262087a87e0ee3e85bb893996f67c18c34f6db3503a2a32af83ba2125f4f56. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ATE069800630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cde1c07cd6030f4b2d46d96d0b548ab489f4bc592e089f986786a5a1b1d1be5. 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/USUM71708096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3584154e5369595d5b841be2aa876da00fbaea68c385325e0cacfdcdb40b1117. 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/USUM71805172.
Alternative Youth 2025 by The Circle Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9329785a6f9b1f210f66f3e289a209b79073cc6e75f5331ce04c12683ae7128a. 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/USUG12306561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96b5fc05b5694a3161ceb9a62fc6b63aed6985068d8163249b220fbc24c2c9f. 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/NLUM71300437.