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 0x1b875748166518b98041ca82fa6f43b5155a11f806eac22840a412e69695c4dd. 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/9a5b81b8-1650-4097-a2a0-a358f02fd4fc.json and https://artists.proofprofile.net/proofs/artist/9a5b81b8-1650-4097-a2a0-a358f02fd4fc.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 0xfe00e68d92ee8d8fdcd428fc0c2a68dd140eafe0abbc89c4e69a63bfc985a44d. 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/ESA011741289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde33ba9a992ffbd90d0f56f5804c132ec7dc53d3bf6411f1e27c80c3d3401dd. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ESA011741290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fe3029cc2909817ceaaf4220fd10d5caca5f8dde7117abbb342757f9beb5f5. 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/ESA011741293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeef85317fc3b4d34c5a4248a1ede14045c3b4f0d46147df54469b3a950dfd4d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:47Z), 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/ESA011741300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605d7cbc33ca13fe4c1c68b661131dd51c253b56e0ca9460a33493a475939e66. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ESA012165510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64709b2b496eac3ae39f2434228eb58750e8d53e3a07f567ecd7c84245fc706e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:55Z), 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/ESA012165499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493b81e24a35a0056f1bc30fc2027bfbd7be2b5f250a5ad55e0fb3b783f8a7f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ESA012165501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da002eb8fe032c3d0534a1eb98168e8c1065588ab6a3dd7323286ad4131bee5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:44Z), 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/ESA012165502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa31ed20ee45a626e66aebdcb6573476c8aa75089a28e15d393f4d3b2709a15. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:47:25Z), 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/ESA012165503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb6d0259744bdbddce3d2e77dad3b8dad818f021e2377525701a9c49431d452. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ESA012165488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8734e6ed04e93747984b0f7d44e14f306ad18995ac9796e0a3451750549cbc8. 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/ESA012165489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2278f502cea552622fad292098a89cac05992872d5dec5ad53875c228b7ff2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ESA012165490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6fc30a6a9aa36df5b7fdd965e40dc2fd832ad2037f0b5e59220e0762144eff. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ESA012165491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe174b05e62f8f4c591701e6944d257e097c7b4178d703fa0fa640b9d9046b2b5. 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/ESA012165493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3db983c158f23dbffdcc1007b92805211b0ac67e920bb5b03f712d89fa2b447. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ESA012165494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ced3e8699f48a49e5593dcf6f68f4c7f13a7dce2d1ff71a1336dac4b20c709. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:39Z), 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/ESA012165495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae12f6808021b09e4ccb35035db596729f03e7840647f9349fe21e73ef38fba2. 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/ESA012165307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008daec51d16468ba3ecccf68f4cc88283e2f69d66fb4801efc0a90d04cb1d75. 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/ESA012165314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494cd387a3b5aea12177de2d9b86bdee1a04506be914dc368f0573b76d7a6750. 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/ESA012165318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efa7718cdac391b2bae072c23a20d1f3921b89a93d3f7a0e6b8658ea6842c5b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ESA012165324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56829b9f9fc995e4c1a4aa03d18f94ba9d8cba2ef4890f90d3a0beadc28bb9c5. 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/ESA012165325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae6c03cd7304f900f60d4fa0df4156b517bb0a713fbc6ac361c64c4b95535e0. 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/ESA012165326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeef85317fc3b4d34c5a4248a1ede14045c3b4f0d46147df54469b3a950dfd4d. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/ESA011741300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78ad43bd9af18feaa14f6ece8c062048bc19ad22d7cd589c19e96708b17a944. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ESA011741295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3ab22014dbf06d1baef09de40e6c34281fe54119d979089ff84846bcbf5f2b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ESA011741304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df7f44dfb7436c067d954ce4ba509d64d3b9a5b76c2d6f5a46eafeef86c797b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:16Z), 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/ESA011519869.