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 0x808ad5f1468b02b68a18b6defdd93aa43bf9bcde41d5761c790e6ba2c3afe766. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b00411e-6d12-4d6b-9a2b-d6fa56b937a1.json and https://artists.proofprofile.net/proofs/artist/3b00411e-6d12-4d6b-9a2b-d6fa56b937a1.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 0x9d5ee8dc15122a1d940b7a09df2e3addb8d5f491bf866c05de1e5dc1faf9f6d1. 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/QZTB82313412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaadc5534dbce8d82aa86dd6d70925796073857491aced7f2b61e88e088aec7. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZTB82313414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2fe52d73d22bc963601eaaf0123e6cdfada825bed8227bfd919fc225e30143. 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/QZTB82411045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82992bf2464c4149c08cb747504b07d70b9bc4774aefdd9a66e6864ef0fc76d. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZTB82411046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4163e58bc3ad00c075bb0767e80f57dee11c882dd8022208438170eff86fbd65. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:38:14Z), 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/QZTB82411048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5060a221237a7ff0be088052ba97cb7bdbb71ab84f3589b21927a4793c1d5dff. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:46Z), 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/QZTB82411049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb692b06c9a95294444bfd91c766ffe3894997a97e72b47e9b3ff1d79fd4ab49. 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/QZMEP2534724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba237f5ad1b7f3dd96560151df6415437e9f0edbe8b2259b32bd333fe304fb7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEP2534726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8261d30dcde543d6e87d8330ed81d8d35ef7cd49f8fdc25e2adc0d18b67805e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMEP2534728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b096970c0ba606868a41fcd02720611db2372ac2e271101031636fb9e6fda58. 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/QZMEP2534729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ddf6b546491ccfe72855b8409798f2cf5b1042df7895ab9ce534d7998352ef. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:04:52Z), 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/QZMEP2534730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a148614c2abee2c46781d25aef0d0d47eb2a5c3e3979c069cafe98f9f9e234f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:45:12Z), 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/QZMEP2534731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d23385a0061eb3c42c76947123f6864eb65a79fc62c4dac8d643c8f89d3f6d3. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMEP2534732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8357dae00215a037f7d9317fb58d98477c4977ff056a42da3b4b84ba9bd64. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMEP2534734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d0bafb0eddc0e24f2b27f06c7468cd6c38461cdf69bbd45a50491da2388ad9. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZMEP2534735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb578eadf48f8b6ade00cf0c5c8c288353f37fa5fd5015994f7f9856b07bc3da. 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/QZMEP2534736.