thumb|upright|A child carrier, especially ones resembling those of Native Americans, is sometimes referred to as a papoose. Papoose (from the Narragansett papoos, meaning "child") is an American Engl
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 0x13fe950c06b3d4764bd17f918f46e6ec72deebc480a4ce13f3d518130bf15ea8. 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/1ab33ff6-954d-429b-bf98-ab2ac504d1ec.json and https://artists.proofprofile.net/proofs/artist/1ab33ff6-954d-429b-bf98-ab2ac504d1ec.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 0xcf69f8ece2b31c2b6b3176d95569baf8ad546341281bdd02b76a5f7d9ec6cd74. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKXN22221764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb566698d62771932296e66687b4e9b85cdb79845d58bc9b706ae3dc1ae2aa350. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFZ2293743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1bdc9128e98aa6c02d986338eaabc1944efc9eb857c6ce0fbb49ccad3d2021. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFZ2293759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d30e67b756c0907b1a9af8569ed74e6fdb45743ffeae9f0d76e7b62a6bea7c. 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/TCAFZ2293777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff2748750bd33ecf9774c7906f3ef0124ed3860490c9706db662c4bad194a5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFZ2293805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4337791745fa5f0ba3c918e1c1013566550c750efdde9f0b32a2030faebeb726. 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/TCAFZ2293812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c190992933d165fb3b12037e934cb9c8564efcecaf564590116370ad55763a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFY2102373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604ce43c36414b13739f4c9b603e93d79d7f600c831f3169a8e4866069e44ba8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFY2102381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6809c59084690ec292f4fc4aee040ccf03ef99b9376e5b868a32de36d82d21fd. 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/TCAFU2149749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad900261eaa89bb0d4978962b00f7da52695851ebc51d5d33422ffa0ee5417b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFU2149756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cfb1214a3cf2d7de4124325354d47f0030ec75cae2f887754a32996482c208. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFU2149765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f89992fc1828fd796f05ed2be7d5784c4371d9b4e7c6a991b931f8a9c07b29e. 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/TCAFS2101919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff423b4d168e53c55b93752d1960da37dec6372e6dd6c6389a30ccb54584a8c. 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/TCAFO2101845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7527594f68a9f58951ad459193ccdb67f3bef7533e37546fadf9ec1204e466a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFO2101900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01d99202a7727de5d1316482905deade19df2867ecc27932607b09395cc95be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFO2101936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc751d6e33aef24a94b9150234abec360c9de9d51426c26dcac1c4c4c50be8e81. 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/USUYG1219414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f89a6a0f30d2e110fd9a9504db0f094ed2038c6213a8353fee8d68d168b0c9. 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/USUYG1219415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e2b53dd8c2d525868e94f400e0c92ff823f6ff90892c89ba08e52f00d430f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUYG1219416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5af75dcc847d58badefb3d5e2f873ef0e1ea6d5faa68e26a87da34f7e9f5cde. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1219421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae50ae614704f35b06d75ff7bc6a19dc9e393cdf10c1313d259d16c05f057cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1219422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8398a31bfa58d2fda83cfe59d37e616289ce83f1fbbf7cb70af2de719de2513b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1219424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234598c4c57655b83b63a892447ef3119e65aad5e222d7152b97eca03c84636. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUYG1219425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e841dbf30fdff6b2a5b5514028fe70861d85e06a75c255d4f35ed48472838a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQY51329506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bcdeb6d275450c8ba6bd23a82e6596b0d78d06ac0060b476043acbf4d11dea. 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/USJ3V1089308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e3e4acf3face96c81f0538a7df299f9f3641b21da00b198390becc4ce9fa23. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR1976756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276f5f959e0234f7ddcf67cb3c6e9daefbdb617a4dc063c2b905cbad4eec8d45. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR1976773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4061f13d0757f2c2b55505ee0c0d85fc7afb81ea7f59b4f049549ef961665c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2031969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4ed55f7207c3a8109d5caf4e108033778e4380c4d0fe0f0f4577083700fe7b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2031979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379cec5b3170baea8107c921843dcbdbac84bdcc39b8ca68ebb26d30ebd3c2a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2138624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6c6dfde871912cc2cd9c74d9ff04f6502367d5cc7fff5edc3f19099fb6d5d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2138626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2d2979a19104a2533c5ffae96e26e8c3da35b0328ecc657815d971576b6c53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGK2218481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab252405c19bd950b1c1a53f9a57e2ebc2dcdef0cc9fdc1965c9b4a6b1754435. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFZ2249239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed27747948bddbf7c0017e9b44314a50bb0a13d4753235131bceaeb8449d68f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTL92147300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de75b791184d028ea7186773b5c4edf23144abd590b8a9a410d07cc863f5bfd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US36T0630208.