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 0xb0bcf782bcf6303b557031dcde41341dc436bcc81b48bcccecab3fd3dab59244. 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/7b83ae83-3f74-45e5-a87c-35c7ba01cd04.json and https://artists.proofprofile.net/proofs/artist/7b83ae83-3f74-45e5-a87c-35c7ba01cd04.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 0xb7e87d554247d3ee695bc2cbcf766ac343904f184c27b8eb7058842af92cfac0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USUM70506291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910fac1e6639cdfd77121421a05c03f1d93000d1557d8e8c1fd40a6e5b15cc62. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USUM71215149.
Richard Carpenter: Pianist, Arranger, Composer, Conductor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b988a703dacb575acc671f9641b1656ff7354dc898142aff6102f4660de54e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USAM19674641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5112c91d00e339e5ef821f82812003cb0c944d1802a021f71adcb17f94f870ec. 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/USAM19674644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947c743db1683bcbc64837f08955c34c6acb4e041dd24e3a9dd88e9d9eb5c76c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USAM19674649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3790cd909a72bf9f804abc86614a0628fb2c60c36543739b9d3b702bf4b6a3a. 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/USAM19674651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199f84cc04e28c899b20ba0359d4c86febab7eb57ca8c2f8d93001462b2f707c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:41Z), 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/USAM19674653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b531a8ea9db5e5eca9abb0ccb176f41705af39ecd27be5fd841d5738e90f67. 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/GBUM72106103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7265d270b0adc689c74e495d171f3741e12b196c5b17b5f549a76d6ab33f9801. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBUM72105704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8df8c3e39da6477fa85ef201f508f80cc45cf1bf09bda592c6d1c36da093d51. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GXHND2581734.
The Stars Sing...Lunch (Broadway Theatre Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07a454bbb1a3ede8d2cce9f7ed759dff547d568905a6642d99ea814220ef60a. 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/QZNWV2228117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc794bea125bde3891bfefc6e5a0a5e54b3617d35c1744c78422ab1e081e03fbe. 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/USGR10400710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b13f6560a3cab78768ee5dc6481bb7461b1b24366d546aa8a45ffa7e696270. 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/KRUM71600112.
Carpenters Gold (35th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e83cc1f574a6d8d9c9af95fdb235abeaf9025d95c15a73ee1a69a1c140c984b. 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/USAM19100471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fcdc0bd81cab6145fe3181dc2363b21a536f9c2cb797b353017fa6e0bcdaa2. 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/USAM19100472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5169aaeb569444da19fa9639129e0ed198983148e6baab392f6c46f38a49db. 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/USAM10200304.
It's Going To Take Some Time - 1989 Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bb9950b4147298249c70279b21699c75485409adb61853818426e677704274. 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/USAM10200439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3df46dc7ebd459f6d1b4756e2aeeb32c7e75b68be54da9361921a95c14866b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAM10200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d91c9a79584d676e914aae27c43e78d3bfdfa2d9c19665bba8f5c993331f438. 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/USAM10200555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc43892981aa47461a62f86b3d48ca627b734a1105b16ed5c962f0251705fccb. 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/USAM10200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f1f9ec7d4f2156687eef93489e2153f40f25ab2c7894de43c4cb5e18ee841a. 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/USAM10200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561260320e5d2b8cde1ca64e76d3cad28afe4d593ded0fd09ce3b3dd6d5595d5. 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/USAM10200560.
I Won't Last A Day Without You - 1991 Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7c47230d2a5762eed872460daabfe56e573ec29b3ff7e4ef46f0c4bffd427a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAM10200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7737fba9b0c65d456e08a654562647b3709a74366a7bff29b58e0e648eee54e. 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/USAM19674654.
Yesterday, Once More: 16 Easy Listening Melodies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fed8654a44b52df032c046fc1df68c085b4d520a71f84da0e43640dd47bd881. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKI199190706.
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