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 0xe58c89240f65c3602869b6d715a392670bdd71137c8f077e5d340002474e39e7. 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/965fd7ec-1b3b-4e3e-bf42-bc53af5b0928.json and https://artists.proofprofile.net/proofs/artist/965fd7ec-1b3b-4e3e-bf42-bc53af5b0928.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 0xd9e2cc06abb888a29cae0fa7623ee34a1a6b47b34b0c8e586060399aa990e63a. 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/SEBBA9608010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1145be66a4af87034705f5e98fb216afdf98f0cec49102086b161cbdd98ddf5f. 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/TCABL1208397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a3d3d11a7b580cb8182783f0b7047fa8d9f40ed222d576d8965784a80d838a. 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/TCABL1208399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ef064d1e1c0aadffb58a49744b8ae6f0c1c0fc8c40b81d7d318f8fa281f93d. 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/TCABL1208412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9881bdf86ea062360fadd308afc9941d2e4554b1a8826ee6aad290f26f026b1. 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/TCABL1208418.
Christmas Folkjul - A Swedish Folk Christmas
Giv mig ej glans: Julvisa (Giv mig ej glans … )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd279b7d0c9eeca12e0e73b654de62e36b1d80b43528fe98e5e6a0b3e1f5cca2a. 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/SEVOZ0600808.
Jacob´s Tracks - the Ultimate Audiophile Collection by Proprius
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd024225b8117ba7d9f9048b3c603438d37b13d4cc22ebeced41a1c9579eb0e2c. 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/QM4TW1812871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081b659ee99a6e2005a8dc63872b1a95643452258299c0228eac1f64e8ee71ba. 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/QM4TW1812890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa20737cb4ec40638d7b512f770e90aeceee9bc5ad709afe357ce184ac574b2. 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/QM4TW1812872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8ed273f2cc4be626d42bc2dba9ebd2c6eb5ec32d0436a2157d4988e6e62ca8. 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/QM4TW1812873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb552dd18ee3d0e475d4303aac94a8003b0167378d0d0404d9cb0bb4d73ce6f4. 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/QM4TW1812892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e7f2b2119951a8a486711912707580390246c3c94bcf748acd67a868ef694a. 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/QM4TW1812874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57093fdbe8e7330559348bcadcf35fdbf137283e9f773f99d9984695192106dd. 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/QM4TW1812895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035a98a1acbca179128ed05e738417acf9ce6e95c10907461228b081aac10c34. 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/QM4TW1812878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d26bdd5aacb8f7839ebab6129a9ec1f7495c0d2299fa97acbc2e6fc166c5833. 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/QM4TW1812898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5c69dee5c571bbf5388a1b919de1d1cd9d9e74c16d915a7f7c3e8cfb1b00c0. 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/QM4TW1812881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a33e6b9f5bbc8a04ededf70e0630d49973ec0b86d2102922546778362dc2d7. 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/QM4TW1812900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f14f9321476143ffcbf4abc1425b9f106f186c432a223fe9a487f07f0d7280. 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/QM4TW1812901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1715e7256a66694609d90a911477129a974c3b050b6a7b3752f6fe66046fa8c. 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/QM4TW1812903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd3dcb7d16073c84988e03458a7d8af495759637c163278a78e2a7221a7da50. 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/QM4TW1812886.
When Lilacs Last in the Dooryard Bloom'd