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 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 0x1e6ae0b85cd880415b67d889f9e9315efe0c6d3280d421e2c11077b50be31686. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54aa1022-3e09-4056-9838-923d503a00ec.json and https://artists.proofprofile.net/proofs/artist/54aa1022-3e09-4056-9838-923d503a00ec.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 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 0xc6081a771c9c08ed1c6a0f3c42d6877943f7813f98f9261dc9e2881b17d6f40b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA492300567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f560ac9dc62275eb7f7f1e9c2db68b50c1fa5de0f60c044f220c8f566a889. 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/KRA492300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714403bd1b7a7e27c7f223acbe39773878f2ff3de1a68ec3126fa769639bbb92. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA492300569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d4f0fd0114833fa7ab367eb06d79a16c6183254adf8a86fd5834eb465e5aed. 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/KRA492300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a958b46b91e4ffda91ff0502c95573560a545e388a599281fcb8df9218f5126. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA492300571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ccac55da111d0e111ecca1780292bec7fd444da2d69a88dd7cf23541037ac2. 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/KRA492300572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a78a603ed25eebde6e2846acfe703d034f5299a842830bbbdb9fd5d5d9e635. 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/JPU902401592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c0c3eb2bcc4f9cc872ced66cf9b1d0445f2b125f5cf5c8aeb5b0b9099d2379. 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/KRA492400587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051e95d4cda9a09ecee214cf028946a7436df8af8607f2d83c395dcd0daff914. 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/KRA492400588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ac04f117fb8e72e7beee72efbcad31a458f59278d5dcf9e79fce73866b5144. 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/KRA492400589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4389c8c5688671c525ee59b7c07ace66ac28f15868330200ca5ecd811a9e55a1. 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/KRA492400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8872ec4a64f325c3d39de56ac6764d5feafca41fc0353868e500439c4e916962. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA492400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c49d110107fd05183fe946422bedaeb56745863c1fe122421fd4dbb5522b339. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA492400591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dce6c83e6cc805599208a9db265e3b9ded1647112fe30d97f16dabef5e838f. 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/KRA492400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877f8c9dfeca9326875784989f50fc1202cf950753e96dab8c1cb558ec3d811b. 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/JPU902400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac57e8cba8b72091b88fab7935e6f645f8b84d7956ffdc2abd537c5917ab7b16. 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/JPU902400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b6308618fc73948b9997ccd980a73e6d843fc9f751c233706140140e7dd2aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPU902400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d44825091904436c786b020c454989221878ccd7ddcbee0371e07a354e6b7c5. 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/KRA492300933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd6683849be4980d53d2353adff61e1662d018acc8b9545da488f9545a80a7e. 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/KRA492300934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc03b67bab80cd4091f893bfdab55a1d8169142a3efec2278b7302b2f15ee28. 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/KRA492300935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192f0e322f90e106bc7d306531da781da358b93f06c699285895550398fca3e9. 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/KRA492300936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f977f5ec1b1acba00a4c6f159e661f55715d7f3ebf3a3b5034b8e9d75981756. 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/KRA492300937.