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 0xb74f751e01f98204fcfeb8c0cb477c9ea60ffb619341b2fdccbd097b824ae139. 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/78d4ecdc-3536-439e-8da7-4fb134823fb4.json and https://artists.proofprofile.net/proofs/artist/78d4ecdc-3536-439e-8da7-4fb134823fb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
How Are The Mighty Fallen: Choral Music by Giovanni Bononcini
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 0xe8cfb846a582177cd378ffd282c5e47294ff62fdd7980be4a68be6f862865268. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLLH2490501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204beac40ba55450ca1f12d8534c84d104527ba063a597b96682497d08190634. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLLH2490502.
Te Deum: II. Te gloriosus apostolorum chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c11aa14aa9e9c1bc4cff9e0f073049b99d7a8b6cc98d6709b16b84559db1f7. 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/GBLLH2490503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2166d3db3f0acb1dc3c74cea5d019db095f2ad02c0d0094d383c72cd3e625aa. 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/GBLLH2490504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31521b20b7a41f846113fe7c84a74d67eec10385ca8267001fce33b5978af092. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBLLH2490505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60ebcf2d1c47e38480b00b8ce4552a30ec8a62c02bc4c0dcd01cbbc5896c46c. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/GBLLH2490506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227a83294205ecf5f207f068f41338669efe30242e0228c650e40f14475dbad5. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBLLH2490507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f850eb03a205fcc1662e7f86d7ef3d82125f513d67d9e884a45ba11086100. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLLH2490508.
Te Deum: VIII. Aeterna fac cum sanctis tuis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de8c33691d3ec696be74c44ef287b840284f6d0bdbc1686fb84664f4668520f. 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/GBLLH2490509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943468f1e4e069a2fd3daaf2c6ee01c301dc84b4f4bfc3db19bc94abbfa136f4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBLLH2490510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabf630f56e844d469ee2b2cb7c51b59633f20c78abd21e3a93ba8d728d2f1ce. 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/GBLLH2490511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc03ffcad9d3348a7079457452cbd435b19dfb3fc90d3f79a63336611c9295e. 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/GBLLH2490512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a3b1ee00fd8a8d97e6c300df60343e95b0367a18438d9117ed3b007f82a96b. 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/GBLLH2490513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc192b543f47a7bc17a439f2e22327e05a0d894e4d6fa936b92b256df33589a94. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBLLH2490514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ad8e7c6d82732da35b7660f2eda80bb4f9519d0b60d9401465eff97523ec4b. 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/GBLLH2490515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb831d53238696d5abf19ed32e593d05d89853a0377138d47454e81aae844a43d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLLH2490516.
Laudate Pueri: III. Excelsus super omnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a997556ab06133f6121a42885f8ed795a1bce53f56ed145c22f7b12d75bf1b. 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/GBLLH2490517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b1cd142546eef783e0f765c1aaadde718c4d48739165439acf5c3274dbfbd0. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBLLH2490518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6039499c9d1ccbd34a48be78d58bb0c1d4f3403f62e9d470172136db7dc9c3. 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/GBLLH2490519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e6a216469b8363513cf96dc8865b3231db2bb36274c0eeb5b592e1a9a6f9b5. 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/GBLLH2490520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817cecac9d47f9dd59557d3142ec2560192f3a3e066fa4c145728b44486320db. 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/GBLLH2490521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508a17c1d4c26cfe58541b30ea208ffffe98f0da8dd39f38184f2d40992af6ba. 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/GBLLH2490522.
When Saul was king: I. When Saul was king over us
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b1c7c385b16feb04399292245d8eb8ee68fee935f8962cd27422d391fc1bc3. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBLLH2490523.
When Saul was king: II. How are the mighty fallen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5036ce42fe70f092eeffb457c01e285f65298d24e15e84d5c7aa2f79596833e5. 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/GBLLH2490524.
When Saul was king: IV. All the night she weepeth sore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905b85d735295e3af152bcdf354f53653a6dd3ff2cb00c16c6268d4a9fc85847. 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/GBLLH2490526.
When Saul was king: V. Howl, O ye fir-trees
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bb1cffaa036fcde17ec4140a2e67a8b603158eed452c8cd86f9337af712d25. 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/GBLLH2490527.
Holy Week at the Chapel of the Dukes of Braganza (Portuguese Renaissance Music 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0d633f37c6a84474f48a99b93c4818623f2f1039c8978dbe2a3e39e491f02f. 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/GBAJY9686712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8694972501b11a35781bb98d93d2a4c1f35824e877c11eb0eb1b7ab1ac0b7085. 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/GBLLH1747503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d9d1fc5bd2b7e8dfa9279d9ebd0b6d06b4e848868569f8dfec51e5adbfb997. 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/GBLLH1747506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a685bbb812a5d74cb27119b0c77f623c6c26053bd3d6eee42c0cf3363f64b97. 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/GBLLH1747508.
Come, Holy Spirit - Music for Ascension, Pentecost & Trinity
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a53b3fe6b31a5cee70caa7db9373dcfed37399c35d4c4c300cd94d441aca93. 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/CH6630477607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d2802f83d4a34080058e86f73785e8bc5a411076e0e01855b014c01b786581. 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/GBLLH1747504.
Paradisi Portas - Choral Music from 17th-Century Portugal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eb089015165bb88c02bc2cc693bff642a21ab2fcc2660ce5c13e90c231a3ef. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CH6630579601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c9c119611299c5db69d4bf997ec5fcd0c99d56d3aadcf2d0d50771809f4500. 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/GBLLH2491401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2748927a3c15a848190d93fa82b38247bf99370f311d116d170024719e1571. 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/GBLLH2491404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459afb3695d615b83956b4967f2cb6034d1f9fbfe9d0b20ba87e9257e9f6fd00. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBLLH2491405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa53e0460576093bd213d9d414e6f9eb93a09fe2b510adba197620b5bda89fc. 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/GBLLH2491413.