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 0x7b907e01d1d3a203c19bc1326828092b4991ee45469e07b643bd0c5a95d95176. 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/83b8eaee-1a21-41ab-aa2d-67e7fc0f2834.json and https://artists.proofprofile.net/proofs/artist/83b8eaee-1a21-41ab-aa2d-67e7fc0f2834.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 0x6df00b8ac27af1d6eaa9cb3c9f77f1d291699247b254a4ff60017829718fa6f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLE031000264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0518c4dc516c3576f93081ce29377b6938b705a8ff8527cfee4ac136419c3ab. 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/NLE031000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caf080684292c3f78854550570cc8810bc763303d50689cfaea110c07c3c8d0. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/NLE031000268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50c0dc27c9497e61478f4dff981e5743d30058bd8b348f8967146984bda907f. 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/NLE031000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e18ac56a4dfa9be29a5103eb4725b6494bb63c5d8c927cb8479efba9de0b60. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLE031000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebaadc7bdcb5c16191382ad8b2bcf00a77f8eb10f3691c00450d4aa36155275. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLE031000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39f4268f8e8c1729f45f0deddd681474a0fdf3b6d9e878ce18a35bfc06fa58d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:00:43Z), 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/NLE031000279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d81b8f8b8081c220ecf38e22570ba8bb30cc0d1dc7a21adf2c66538efa956. 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/NLE031000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6509ae760c6a3ea9a79c7379baa72161a9529db13d4436d8042664f633f1be2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLE031000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b960cf853e4e0c21b8f4b50ff442c838f43a2437f9249a2f8829ea42c8981c9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:08:17Z), 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/GBACC1633801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02eb001f7cf49edf0b4139f6d77004dd890cf9358296d7b99e80c51758e20e1. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBACC1633802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13347de030f2fb28c88fc3832d708eef0d447c8ea9a53e621b82d16b894111f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBACC1633803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbe0c17a32603df538b673db214cfdf59f045b187bcadb4f87599c1eab111f1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:09:42Z), 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/GBACC1633806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8defcafb4ff22ae91b593468f75e47dd87ad1f7ef3f3804171a3cea8630692. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBACC1633807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e47296a36d0989bdca3f59dc5997eecb655f3a03737195de9971f26fc4a25e8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBACC1633810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c87d68c173065cc499171c0a6ca1ac581ab7928c8c9ef747a6027b9ebf5ab9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBACC1633815.
Step In Time - From "Mary Poppins"/Soundtrack Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9c5bfc5050472f0638117bed5a2aceae4da9b76b3a42c592e5c3e677f6073. 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/USWD10423162.
Superkwalikwantiviaextraquasiotisch - Van "Mary Poppins"/Originele Nederlandstalige Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9465d4e1e22af5ad4b12b9a4b76eaa574a866af12c4e92e7327075cee5051c83. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USWD11263062.
Mary Poppins 50th Anniversary Edition Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9c5bfc5050472f0638117bed5a2aceae4da9b76b3a42c592e5c3e677f6073. 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/USWD10423162.
Mary Poppins (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9c5bfc5050472f0638117bed5a2aceae4da9b76b3a42c592e5c3e677f6073. 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/USWD10423162.
Walt Disney Records The Legacy Collection: Mary Poppins
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9c5bfc5050472f0638117bed5a2aceae4da9b76b3a42c592e5c3e677f6073. 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/USWD10423162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9c4438560330606f0b2c14b1c8e2b57938a593f342ace095a156a15077a681. 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/GBACC2046301.
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