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 0x3513ec2f99fda43586490a894e3f90357441f379301254f7cb5afd76a127b8e2. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37187022-8461-4877-bfd5-f4966254682d.json and https://artists.proofprofile.net/proofs/artist/37187022-8461-4877-bfd5-f4966254682d.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 0x05d3e7e453bb1e80f612bcaf75ffb8197c8f5e11386bdbef879cfde761ea1d84. 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/FR50X1966502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa017edddfa1852a231301a6d496803b9a835e99a898531a26cf5ce5a2e5d72ed. 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/FR50X1966503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73eae2bfee477f138d561ed10cfaeaa4aa3cdf53e59c828272a4233a0bf4ce5b. 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/FR50X1966504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab477e2cfdda89a1688d696b6d1881f63074dca6c841cbe137e0489851a3cc3d. 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/FR50X1966505.
Requiem in F Minor, C 8: III. Offertorium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7a364593f660d95030f83a80a60e49f81a9b2cd2f759878850ee489d9d48ce. 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/FR50X1966507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5acd8c7c575057fcaa238677f9d80778775bc917e9ad105501c6ddbe8fc271. 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/FR50X1966501.
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 0xa28414c5c16c6b5756de0153dd39c5469b6a5089e65ddca033a6f281ea1d4b49. 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/FR50X1966506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1382b649a371e612c879206adef49f6563aba1425dd9570982378cb372ae5fda. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR50X1966508.
Requiem in F Minor, C 8: V. Agnus Dei - Communio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66ffd218f1c21f284b473e505ea7e57b618e4026f742d4a83656557926ba5c3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR50X1966509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2e1e0f7222dcb30ffd29bb539908db0154cd04b5c12289d894e079304dcdc0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR50X1966510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91492c408e8225d215757e6489f811e211835e40213c28996a8ba99e64576f30. 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/FR50X1966511.
Oboe Concerto No. 1 in B flat, HWV 301: 3. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecbe20f57921525437de24485905911d721c35fa794c1430ce2f74b46bbbab1. 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/NLA507100422.
Antonio Bertali: Tausend Guelden. Sonaten vom Habsburgischen Hof
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0117cd894657b6a26663ad31bc73fc826adb5452d170272e10d23d79eb2c37df. 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/DEB110000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4017072da6fca558bcf9fde7e1373e7663e9a17dedd81634ac6546ab2ad5c5d2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB110000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394c1280074f4bed03e2d6ca868a1b93014a25c67c250a89350d37a12a7b907c. 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/DEB110000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc6c853bb273c209369869fb797fe5c6e8e81817ef90879f63436b9556fb06d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEB110000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399b1fd83b93819fd1d6c167dee0cbf410e11cd94e8d53bf62242a89232010f8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB110000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3925205116c3c2d1e451b41a7ef8240cdde8bd618946dcb4dde635de9c50a8a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB110000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c012692f9b387ba23fdf3f014bdeb0946b3f5c97a39c7a13c8b63799753b6. 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/DEB110000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf989087b1dc0242c3026b944f2b95096955cb38943d1395700035bdc0ebbf336. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB110000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f36620a11b19b4e3458fd998cf74c5a4161ee9e9615ac8b1581abb0c53b540b. 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/DEB110000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ed2445b42b83fb58970f18c43f01800a885266ca5d136bea813f749696d73c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB110000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6623a22ec4bd31f7b857975a42f48da3785069c77740021999eeb90d79c37. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB110000210.
Georg Philipp Telemann: Quintetti d'archi e Partite per due liuti
V Festival de Música Barroca "Misiones de Chiquitos" Vol. 3
V Festival de Música Barroca "Misiones de Chiquitos" Vol. 1