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 0x810a30aef91f15f4ca04e907a3f10a620d6f80f01d6661aae848ae3a2501db50. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89760bdf-1872-4849-85ba-49c278062197.json and https://artists.proofprofile.net/proofs/artist/89760bdf-1872-4849-85ba-49c278062197.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 0xbfa90ca8d7d559b974677d7b535385e23abfde0167f144b16f0be49a96fccfd2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHH2310184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff61758695a8a70eae813cffdd5c4f47a3d897c837fb34b28accfb5273fb084c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAIK2488179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba711903941605b656c8b995a18fabc3f66418f01cd867a8de3221670ff6c74. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIJ2488186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c178bfa959421c492d629d1214c62c6c18e0970c2d3f8a64729ad7b07e5d7ab. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIJ2488189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe371436eec2ef20114a8a6144bfe95e87f92e494ce988531ee968476448bcaac. 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/TCAIJ2488198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92302432c000e25e0d9d93b0f8e8bded681f0f8c95baef660ebef351f4ac08af. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAIJ2488226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe9bd42502b7c161c270992257998ec57c12d359b781e7315221e2c16cbc9c. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAIK2488233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e78fba1ef806cce68f02023e344c8d90a6d3f8cc1d1f0a7e11eaddc01d5ad. 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/TCAIQ2413555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f924817c44d0e5274b111de5a2ed18b554f724e5e2b68f4807837b53b4454df. 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/TCAJD2497808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c3fc4f500b6a09d85cdb3845bde008c4483bb41c4ba1735ea600636ff64361. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCAJL2591564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9db071fe8031e1e7fd3757f3ce4f9a9674793b1e6f6594791462884127c7b19. 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/TCAJM2510330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daaef4e03c4943d0e8b0b29fd7121f391f8bd5d8d29d00ef447b9eed1ad6ae4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJP2556504.