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 0x81bb89e5573d0215b0d93689a2fa31d09f8befbce2e21c0b646fd21cc16c365f. 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/70932434-ead0-4f03-8dea-7c5ab7de87fc.json and https://artists.proofprofile.net/proofs/artist/70932434-ead0-4f03-8dea-7c5ab7de87fc.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 0x33ccafee278f67bcb5f752dbc3f37c83311ffa5529d1192a7a21d639c13116bd. 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/DKUM72300273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3742f1b618f07dadf696a2c43c08df943130c6cd791dfdb33dde17f0d710e932. 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/DKUM72300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ecb0c7e136c6aeb1c344396fe122c0ee0673f6f6c92ce7434a00a254887dd0. 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/DKUM72300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01c83f1ed2b9bdbe21d23b93c4b1a40536ad37cd0b4b98f170acd02c2338377. 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/DKUM72300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e59ac6776b1fba1045ca94ee89dc93ac08d88a15da79d677f5099a22cd56f1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKUM72300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cb12b0682a4350c4e7f4e01ee91448f4ddb62772bcc1c2b07a74e2c662affa. 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/DKUM72300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0a71a3923e85754f8ccb219d1de559a521ddebbf12c4dda1be0b1f9bd1052d. 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/DKUM72300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaa122fdb2ba5e8ff930f32959e791f26c01a7ab8b0873ed317eaca61917b2e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKUM72300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a8c2bca15d152df5374f2108ddc54cf1009387512195ff8ad1c1c13943a443. 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/DKUM72300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd30a99318a972a3cc1af18f744433669c93c511904dc5c50d29fa23e357ccb0. 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/DKUM72300535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129d0d0ecd340f51b7f7a9074cfbf4dca09527b6916e01d3f83dba834d6e970a. 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/DKUM72300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa72710c62ba2019567d99f23e7771002c7ad3fa6a37b42ada17a9b69c3c552f. 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/DKUM72300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd802423260f1e1327c1894723f8cb879b22fb34ecc97ef36bee329a929cb66. 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/DKUM72300577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc8bd9cdbbd2a1767fa4d73ace5c014b15db611daec09392e8ea883d6efabbc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKUM72300578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8c9c9b0e6bdaf5a0a3fbade71dc0d13d6a20dbd0658fbd28a765bb09e6a81c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKUM72300579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12c2da5e3279b3c48828f4d978d5fb2511e587f2d4d48797edd31c1decee264. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKUM72300580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52f7d94330b28d34fcab3a3a41b64b0655a7028c4ba1e5e245ca645507359a4. 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/DKUM72400215.
Enhjørningen EneJørgen og Andre Sange til Børn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc8bd9cdbbd2a1767fa4d73ace5c014b15db611daec09392e8ea883d6efabbc. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DKUM72300578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8c9c9b0e6bdaf5a0a3fbade71dc0d13d6a20dbd0658fbd28a765bb09e6a81c. 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/DKUM72300579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12c2da5e3279b3c48828f4d978d5fb2511e587f2d4d48797edd31c1decee264. 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/DKUM72300580.