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 0x3edd53554af119aa9f0fb484f382fda3c86fa4c22aa649cca4a148e778c68b63. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7052efde-f1eb-41b8-ba37-b36b2b6f1d1c.json and https://artists.proofprofile.net/proofs/artist/7052efde-f1eb-41b8-ba37-b36b2b6f1d1c.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 0x402be3ab194808472df4f6e15bdb12c742b3807d53010fa727f1048d0ce9aa1e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/CAL540708503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ba894d9fb14870543436f53a0060f0ec2de400a40ec6f02660234afdb7177e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:09:21Z), 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/CAL540708510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74b34adf6069b0421c3138d037505c2355ae96d609494f19d6f2cf4c4003bf0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAL541517302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad37509632bb68967c769ac111f00af6730433a5499fa9dc611ec14e406e5acc. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/CAL541517303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d563148ebe94221dd9ae6814820bdc39682d1525dc915695e0160e65bc043b4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CAL541517304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f64d14b81688040f41fc8e298e35dea2f82ff2b09e59a8bc20e534f70a28e8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAL541517306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c45420d3fdddae4df1c96ca809547221d9df3a9ac409dc61b3cf99a070686e4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAL541517307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca71b362c4a9fef95a72a505abbf370b9405b92f95dd04c717691fe0aa12f3f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/CAL541517308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f5f1616b1dbff24ade118ce1ada6d4a6dc44b0ab68dadf41988575393c7204. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAL541517309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1fcef35118578b30c4f597ab9645c96671854953546605cbae2b27ecfcb7b8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:31Z), 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/CAL541517310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52589faa829d0abf5fb1fffa3402684cac2e41ad61aff6f840005e8db81c6d0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAL541517312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a363f5f81c62e5fb104c5e503fecb24b834576e2a9641a7c7d5955fb1cc5988. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAL541517313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0dde419c8f1886c962d6241655062005b175977226de0337c60b371413dc08. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAL542122404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed75d8e473c2fa2dab4782f6705ceaf9902f8a9ba16cf4949cee9b6d4f88c8a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAL542122407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62351ccad5fe3621176a5c9ace636b991912b82cf1fcdd8edd5f19b0f688aac4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAL542122408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3fbd9c506f26847adb3d86cfac332750a81235b37292e3423077be3405733. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAL542122411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bb235886c811bd944a21abe87b2fdbfa6a15337fd39350a582822ba685962d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAL542324201.
En concert avec l'Orchestre symphonique de Montréal (Sous la direction du chef Simon Leclerc)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc621509f45494acd48e23b65c299662f43d91fc2ea5ec1ed7d580a7f6931e4. 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/CAL542122010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ff1ae407c62b7bcab219f97a0db28725c7e3fb428593018a6bb030a24aa10. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAL542122013.