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 0x20cc1f53f3f8b599c48e7ed65bcefd13c108ec8ee4b3842d81f57df92eb2f80a. 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/badcd3bf-dc92-45cc-a10c-f19ba209159b.json and https://artists.proofprofile.net/proofs/artist/badcd3bf-dc92-45cc-a10c-f19ba209159b.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 0x94a9fa9bf74f227ce91d4a76f65b97df59b570b48387595019fed96f62a2cb06. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ATUM72200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fb25c9177882e0ee792dd9a6eea19f976cc28cfd49b4e0c23892fa56dcadee. 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/ATUM72200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a6cc81e06bbe44648aa83a516d15749c419e24064d7620f32f56fa68cc8bec. 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/ATUM72300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47cae7c59f52f97632e320528906ccd33a62ca425460ac25da53f23c8d86761. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ATUM72200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d623424456493afd0632aa02765572c105ce3600e79e342b1de7a23ee94fef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATUM72300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476187c306e93123e43692ab9c6c5cc0947f4a4abaf8ae57b50fedef87d15e40. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ATUM72300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc72a70b9fd45be65a90261a3019e1fb027a701ba1207c21cf1a272d4f4fa5e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATUM72300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368c9536d9e773162ea508d63bcf3b9cde855c5a1470aed732f7b5de2721b339. 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/ATUM72200295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963e5142623fb5d25bb18988ec2030a8ba0f00205bf626f8e5da7307b3b20694. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ATUM72300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df3fda99f8b2c6081d5866acb70e8d7464e61a95711936ca8ad23d84e7eadf6. 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/ATUM72200329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb30256d7a476e5d60200397358cef50bed19a1a5acb442cec43533b50bf1e7. 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/ATUM72400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8933ee2eaef0c7dc4b12290cc686faceb90ba020aa6e8c4db731da4526926510. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ATUM72200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3109173389ff888d676b39bb78e51d844e152090e7f5604eaecd62c97bd1e4. 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/ATUM72300631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86588f11a641533ca3f5557496f4a4fd0dff31335b503b36cab2ae0eb4b5340b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ATUM72300632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4702090053aa9895640672b34ede4d9c30e2648f76bf97e6c2c788a7a35fe144. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBWMY2400600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b19737df9e4e3740d9e346f2110fd4f0debb66525c1c7a8ce628ced9bce65bc. 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/DEPI82446131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f66741ecc2f6575c59ab03211951d77235ff7daeb6031fd750a31043f089f80. 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/DEPI82452736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e548d29a19650b6d55ac4b3875b942fec2961116d3b1aef8eec1b33e0e070d2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEPI82452738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56009d0c321836431e598c720842b0f75f5be620a62488bdd863184cf982421e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82452737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0a66fdad3744ce8b5736e2988c349ac7461f6b398c2147c9c4eeed95318209. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBWMY2402570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7327870832cc5974c2816510181d49dba9c0d03c3c9f2aa6dfc86cfce7e967. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAKB2509805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe6ef7b2573a6c1387196bea25afecef664a800ab54399f25a71c3d12cbd3c5. 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/QZAKB2509808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe69c4298d250d78798a251cf4c13a3beb0f45f24b8935b36022d0895c1b39ea. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZAKB2509811.
It's the Most Wonderful Time of the Year
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1767f7833702d35cb28e838dea979c76b45d82bc4dd7f73a7cedae0d8a2240a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ATUM72200291.