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 0x406f641da19fb3f9ca34765bce5a1c39eb3ca2d013b8c6800a568299d69692f0. 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/0a9efc8e-9d04-4288-82c9-f73612e0eb69.json and https://artists.proofprofile.net/proofs/artist/0a9efc8e-9d04-4288-82c9-f73612e0eb69.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 0x26be5684c97366c03236b3a3b6a6c302181241af5354dc42e0429a44da9bf162. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6541885132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547588fc4fb60d9c01f0036aa67633a47c2098f3120b467e921b53dfe800fdff. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCADX1894468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3245930f369792d4b958e43883aff31b20945c6208d490e918d1a52ff9392e01. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRD6J1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4c8473e6297eab3da570b112886b498632df87f20259386ed54401fd7b982c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCADZ1826112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed6d8dc7f4fdeffa0be25a29e3c0cc00ab6971e8dff214c670ba77ff84124b9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FRD6J1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ef94071a26e50387065cd759aac7be45bb650b1ce435a6dac537395c203dd5. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/FRD6J1900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031cddfb2e3912e98ed33e36ac592e64cced55128ff3acc837badf559685fd18. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRD6J1900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeb0fc1f4de8e7b8c9fb7e50129c7d4ef73d26675b9428e8551ef11c827ccb5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRD6J1900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651baf4afb3a1427bcd76571dc9dd59df128f6264be9e6dcd062001cb389a2db. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:29:44Z), 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/TCAEA1803270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7a86fc61a20004bf2dda0ef30bdb0729d9e58b8844184da99f94d22a0567d6. 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/FRD6J1900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0e5224fe31f2f87802b0fc3986a2f21f8de92abdcb3a11e2c17391cf549731. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FRD6J2000040.
Block note (Extrait du projet Art de Rue)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916f98e53a07de8ac2efc9e24d3c6422272e3555e0660504521dc459884a575f. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FRD6J2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b1913c7ad3a216c85fe64d9bc19daa4ba653b71383941ce2213ab003725bc7. 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/FRD6J2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4cd2cc640181f7c5bbf2c8f27ec501e06cc04e54343ff134a1575bd06f9d5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRD6J2100010.
Misère (Extrait du projet Bendo X Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeecd6f6a062efe60d63c99becbd318c114acd9fa55110fc0d007f8c7eac6e3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRD6J2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eead826678dfb2bb5dbd551482d91c98c360aadd866c54b658b73d2c86f41f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRD6J2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e46cd15b27884d5295ae6111ccba09a2af35967a02f5ba8b533a22c36d52cd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRD6J2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e46cd15b27884d5295ae6111ccba09a2af35967a02f5ba8b533a22c36d52cd. 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/FRD6J2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409f28e40696ce06159b70ec2064727342e3be4df9e432b315a2c82c36a1ee75. 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/FR8FB2209150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cd2d267001ddf6e8d13baca8e1d24362d813bbba63a86c90284ab98fd78dac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762125240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb852fc7858cc3b1eef68919bd08fc56d37e621f4db7950844c27ec06b214f82a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:00:27Z), 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/FRD6J2100210.
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 0x382ebebc2da8c00ab4ff023fc5ad463476bd82292c705131af2662432eb4b99f. 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/FRDFA2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8117b2ed24d45c927c59750100071dab3d27fd23513a4a6ee4095c4782a1212b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR9W12431088.