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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 0xea52ae60880de720a9a4a0c064d0994bea9048fcdcd841836e744f36f172eb5e. 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/1c67ef2b-d05d-4126-a3a2-c8c02c1cd1c6.json and https://artists.proofprofile.net/proofs/artist/1c67ef2b-d05d-4126-a3a2-c8c02c1cd1c6.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 0x070609c4fd01a382f547c537276f0bb4d8e8d526f3ced98769632d8fa2932899. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6V81295503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadf616ae43128df610cf2d166fd570143c7ede42aedff1ce14831703a4c0a34. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6V81295504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565b73f960e08f37c25120457b8e51a951982fb95c9fb2caf4926dc9cddc23c6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FR6V81295506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d7a9f3ff4ed49b971bae9f4bc3f4e581675ae8e65fc29c6fe2ff6bd3dd7fc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR6V81295507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee1884ef02799e298cbda60970e284e69b11c96938b333d28fca21cc99ce3e5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR6S80400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dbed2443935762824034acd28a69dfd6598a6cdfd84dc8ae12ba949987d38d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR6S80400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaecb5d713254a756a254007665545155dfb852a3593e21a7c93b888a21c81a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6S80400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e64c27f269a24f0a80cf436d6a6e8c4c6a4ce9074cb8838f701d84935e5353. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR6S80400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f90109973c8000966418e420451ff35426c4788cfb313e200542d7a510f2edc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR6S80400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75a706e4fa75d08030e4f05ba4c97e461d18b97e2ab993055e74bf28efb967b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR6S80400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd38c115e5218f0b5fe793e0f7774dab53951b0beff0768472ae58b3da59c17. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR6S80400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf576f37e14bb235ecd60273bf768cca5c6db3e2b6faa663823b63d38915df412. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6S80400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ad7f8378b8afe4a244b2b2854928183435541f807f287ee978b61e5c2d276c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6S80400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5d0d322ed65e05093f6cbfeffde15780a5917a8c84109eedd38d299430eba7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6S80400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa712e26f2b96fd5b91bcee95c6f95950b2b6e6a12baf7a045eff10717ccd9c7f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR6S80400010.
Shapes & Shadows: Psychedelic Pop And Other Rare Flavours From The Chapter One Vaults 1968-72
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a70148287656e55b4c27e310d5fec8e664bb3687d4f0387e82a7fcf438f1af. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLFV1400987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6e55108eb15c2f6f7c7cce617b5081309ce3dca7f6e72a5be2f7782d735c12. 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/FR8GV1922370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a536e9c507352e4db899c7ffd77e5b49df159ba06a89bb7582195226830c2c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR8GV2115240.
Les vrais savent, Vol. 3 (L'anthologie du rap français)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77a657ecd0c78d5320a9d664e5593c792c1592c123e969ea9a0a51822258bf2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRW880000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8471232ab5af4408218df481340f52c9d89f9561a76e7dfaeaea57225c4041. 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/FR6V80853675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1553f305e468e214c9919f5b3041ac018b764accbdc409af73aa960380c5b9. 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/FR6V82556280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac58b9e70b83304a81e788b0efee43191dd60a8e8a83061ca4b7c6ec2363446. 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/FRX851801164.