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 0x21b0be457fa880bf482db004d953688e27309b9c391326e5a4808ee74f0deb29. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/338e4ed7-6664-43dd-bbd1-fd68c22a8ac0.json and https://artists.proofprofile.net/proofs/artist/338e4ed7-6664-43dd-bbd1-fd68c22a8ac0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
5 Ontario Folk Songs: No. 2, The Maggie Hunter
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 0xcaca64e7821d1e0ca4ae5fb707db98b86ecfa306684279a84fc351bce5e936e3. 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/HKI191803703.
6 Canadian Folk Songs, Set 1, Op. 41b: No. 6, Danse, mon moin, danse!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c29feb20c3e52d9ce17f1d9837856a75b5ff05730fcae96a693375f2ad1fa9. 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/HKI191803704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b445012cb0f3db8ed7c210d1daab18106286b286e7fee7a5b2e18f2a1e848d. 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/HKI191803705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598abbeeb4887d32099d7c26ce7e26541141d6732d53c0228e5f8fb129fe2bb0. 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/HKI191803708.
Pussywillows, Cat-tails (Arr. L. Nickel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc71a0e7d5c63d2a723d9e269157465d5b2c91ba8fb2d92ae7247e8740d6275. 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/HKI191803709.
5 Songs of the Newfoundland Outports: No. 5, Feller from Fortune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109fec20d369ad471e0fbb2cceaaba70a16875bfb925a2d139599f4b75758d6d. 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/HKI191803711.
3 Shakespeare Songs: No. 1, Full Fathom Five
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaef57170b297e3752c6528c72691078780fb39ff539274c70b168b70a4c2cb1. 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/HKI191803712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f580b717b05db52551fffa0f2b983582301b9574527ffc34a0a3dfeedf280f5. 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/HKI191803719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966b575ecaac05e93a84ea519a8f9c074460c18ef42df4ab2dae19496d0b463b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKI191803701.
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 0x68c0870c3ca5b0ab4d94b06c511cd5ad66836e42f161166d517833fe11ded64b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI191803702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7dbeb1f76de4a03cbd2bb85afa8f0eaec81049d50bc60c5c3dfbb98f209985. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/HKI191803706.
Perchance to Dream: We'll Gather Lilacs (Arr. S. Ralls)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500ea35335058c5c21432d4c1f8a85f10268691ee792be01d1fda996dc60b8c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HKI191803707.
6 Choral Folk Songs, Op. 36b, H. 136: No. 5, I Love My Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8ad71151f0758d3c697b7b1d6b7f0eed161c3d5a3e3ddb6c4af16a059d2477. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/HKI191803710.
3 Shakespeare Songs: No. 3, Over Hill, over Dale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55501eb5fc399b9a1d119e6709bf3e68cd3b35f25cb742495c1a4d31a69ee3eb. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/HKI191803714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3763a9e65373d1832f981ac5572730cc5cb8c503e088069f145cd0265be2eac. 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/HKI191803720.
We Rise Again (From "The Rise & Follies of Cape Breton") [Arr. L. Adams]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c0e4c924b739115035402a4c5748b6695a4b85eef618b44e3ff52c21415d63. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HKI191803721.
Radiant Dawn: Music for Advent & Christmas