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 0xb74ef14c1fedaf48402fb686acb7a476c6df9fb29908814d204ad2d822e37f78. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2d49479-fb27-4345-8c7f-01d13ca1fc05.json and https://artists.proofprofile.net/proofs/artist/e2d49479-fb27-4345-8c7f-01d13ca1fc05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Agócs, Harrison & Rodríguez: Works for Violin & Percussion Orchestra
The Christmas Revels: In Celebration of the Winter Solstice
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 0x3233642132b9c957d1932be74c58b3206e858a9c69b3a9290d768697a49bff7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US89R0512721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175238b108b16e908ed3ef1984b50beececf5631e253b828078b74768fa6df4c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US89R0512722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d0e8fc44085a011e02c7f3b275746aef031ae44ca7f52064a517f2352c8cb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US89R0512723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d36a27c34ede01175bd6a8d4f339761eae00d2e21aa773d8c4f20d4f1932718. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US89R0512724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556f07c48c074e12494df93723a234095465c1d5d84d7c576cde8125e5664687. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US89R0512726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d32b509d4f3628986cde8f1a55774a42993e15952bc8216d44df9e3cea1b23d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US89R0512729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda491989331a60722e7fc162d27ecc34010258261c714ae4b8e768176ba6a9c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US89R0512733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d39a352dda1880f930ee3a331e2f4d8ac175d1671fac04e21f211fd122203b7. 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/US89R0512735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef24a6c1cf1ab13dc333c8c696f3fce7f95242add1bd048cf47d46d2bfaaa4d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US89R0512737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8147806a111a59e508259bdc23a39bcc1320c488775bebd21745bb1f6e2f79. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US89R0512739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708aa5d19f0f0ea3a99cefd2de79d572987ebbc28905ebb96bb9314a7e1f75d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US89R0512742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9737a04732822caed4762e71687983212c3533412bccbfdf3e7fcf214cd578dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US89R0512746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68871675255124970f677c06492c7d95f025829a613c15263590e0e7d43a0bd9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US89R0512747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c4da9dd45391b1fbd8103e35f7c7422a714fb0fbca7fbfb8b63fb61735e8c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US89R0512748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951fb48842192aaebcf4cf73f2b12fe56b08704d870ca4179cb2de01799d85a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US89R0512725.
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 0x8a855b70bd21fd9ca65204716c2f093b2efb422b3cbe63bb46c8a55f49eee6bb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US89R0512736.
Wassail! Wassail! Early American Christmas Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b5652cf5ba01c1a50c5e73b9580840599c9a02e0c1da97ab1a6b096710aca1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCTH0500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1657eae169cc93a5d47fbe66046625d499fb227847e162b20e414dd743e9e4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCTH0500389.
Wassail! Wassail!: Early American Christmas Music