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 0x0065f4e0ec0aa76c5757a65aeee2d391e859a05cb91175f6bc54b0ae3489853a. 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/c0736759-c613-42fa-8bac-6e9f7e0024f6.json and https://artists.proofprofile.net/proofs/artist/c0736759-c613-42fa-8bac-6e9f7e0024f6.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 0x926cde5c9951c51d5f2ac913ef2e7ef824091eebea4b7a13f6f48bc405251b0f. 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/CZA160606289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc208f7f2027f00803f7154947f34c0acdd9f7345a3a0bee30de48848b2ee8201. 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/CZA160402514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbf93725a7dc48cf167bbecce8bc60cc7dd271fa57cc77170a4466709e027fc. 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/CZA169700443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8a663339cf7d89251bf8cbf5b6549cb260387167bd7d6186c6343a883dcc4f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA160606295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067a3570bc5697e11a05e3ceb9e940a7cf01702efc9ac6ba9229294f84aad90d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZA160606264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0346b1a72aa49f83245617c7a0d11514106774b87a3bfd705f07c6244e9f18ed. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/DGA072105936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2fd16ba66137adbfeaee851a81685267fd72499a90f299ba1f09d27716f0b3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:43:16Z), 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/DGA072105938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55edec023e2ea0c824232d8aaac1c90809c5b2adfd90b218d709f1b7deb4f81. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/DGA072105940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddc64a8da88e4402f2c750265b80bff3ad3c33e2125fd3ef5e98fa0faa4f34c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DGA072105941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabac958b6755628347ff7a47e931e739c0e3bdb60373c78eba22db2659a14c88. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:48Z), 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/DGA072105947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629057a0fa856c64f4ac139db8c2bd524802ad0575d6de64a2e61a43e164b399. 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/DGA072105949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1899c6b945364ccbb9554721640f16bfe3fb534fc313f64a03311f91043062a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:08:45Z), 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/DGA072105950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081ed074c4afc68797d166d9e4a1c94a83af03efcd93be7acfeef16bb0b537aa. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:46:50Z), 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/USA370579392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42d76f0e25abda0744fb247232ece4a35c677edffd46f5ab075c7074cf92af3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZD451384905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581cc7329f0df20da1e0705e7fe51657c5ee40e39736d86cb33c6ede684f728a. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/CZF331601690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00d4f4c5b7c851a3071027ea874b4d502f20286f710a6e3ec32c780c721552d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:18:28Z), 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/CZF331601691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b0f084f7d8796a890405735ee2605382213423856224fdaf038209fa3da83e. 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/CZF331601692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7910a95ad2776cccf854261c43e7181a29763fb8265495d1fc012dfc7e4c920. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/CZF331701763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779d7531d7afaedc68465a3ad93cb998ed3385c20fc2b78d11a99b181f913292. 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/CZF331701767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59c1d9fdc66c5d3d65bb4c24f5eaaf9daceda1a6504591b8bd3e44a2932f7b9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CZF331701768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f328d9a4852006c311bedec2cd100ef06825a5cf104a537e77d4424f86e257. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/CZF331701769.