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 0xa5752ed3b0570de91c56e6b666071967a929f41117be8fa4d7cf35dc9b0f5166. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a53a65f4-1816-49ee-99eb-fb16adc00b8e.json and https://artists.proofprofile.net/proofs/artist/a53a65f4-1816-49ee-99eb-fb16adc00b8e.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 0x132a884cb840dcf53a18478e3335b53666c289dcbf17bcad197c4144154af497. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLY330903682.
Vespers, Op. 37: Bless the Lord, O My Soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b21c0229eea80efd595c768d62b051c3504ad63596b5f4f49f7ecf135a82c6d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLY330903683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6bebe1576501f98bd3aea89942b9943f6552cdabed0c728b6a58462a2e6e48. 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/NLY330903684.
Vespers, Op. 37: Now let Thy Servant Depart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c523efda891f70dc8905075c4ec3ba4cf4329757c2885e95c32822029fc13cc. 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/NLY330903686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac1f97c35c5cdb27b94cf03dfe8dcfc99816b89444c6f270c4a5e412dd72f1f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLY330903687.
Vespers, Op. 37: Praise the Name of the Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ce909a97d941862072c72d8af9f0974f0fc5b0642eda2f8dc6395da4de7ec3. 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/NLY330903689.
Vespers, Op. 37: My Soul Magnifies the Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd7c24c70e6174f93711c800a7c3abb0bf65aa9be633a00783f78656ea8a340. 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/NLY330903692.
Vespers, Op. 37: Troparia of the Day of Salvation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea06f126b3b5c046efd1aebf11d3255ffa32e26f6808678b549fce831fcc12e. 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/NLY330903694.
Vespers, Op. 37: Christ is Risen from the Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51f88412a6e5ed62b1a05ae2a21f79e792ef5809a02589f06509fcc8dda4a97. 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/NLY330903695.
Vespers, Op. 37: Thanksgiving to the Mother of God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc0d45f386fcd20e7e963b47763c0f77414f4b5e7a8c1ff60c030aef6a21dd1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY330903696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838f3454d4f19984fa9b7836d06f257d1f6b99e70e0408ea5719ac99f4e0da15. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLY330903685.
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
Vespers, Op. 37: Glory to God in the Highest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f87821917272688cb3f69daf471e5ef5d6fe049ca71b60a4f4d439f5b31d03e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NLY330903688.
Vespers, Op. 37: Blessed Art Thou, O Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89323b7a800092d21b482d469d1b2604f9469e39bb4e8aefaa842a0cabf62442. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/NLY330903690.
Vespers, Op. 37: Having Seen the Resurrection of the Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6db7342de0391ebba297b30d7235c127b586282892cb2eb9be1264ac441f20a. 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/NLY330903691.
Vespers, Op. 37: Glory to God in the Highest (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2107da4b86e9aa24f1fa7f812ab34ec12e544246425691c54638789aa21ca1. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/NLY330903693.
Vespers, Op. 37: Bless The Lord, O My Soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1c8110e8bf935a0b89a4f2a156366f91134cf19870381266e796df2d0f50bb. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NLN580527467.